Initial stuff that I already working on. But maybe, I will add stuff in future.

Console.java

package yuu.tube;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Scanner;

// Console class
public class Console {
    private static Scanner scanner = new Scanner(System.in); // scanner private variable to store scanner stuff

    // method in Console class, we can access it with => Console.signupOrLogin(...)
    public static void signupOrLogin(String answer){
        // get the input from the user => s/l
        switch (answer.toLowerCase()){ // to lower case if user input Upper Case like S or L, easier
            case "s":
                System.out.println("\nSign Up 🌈");
                System.out.print("Username : "); // user will type username
                String username = scanner.next(); // store the username
                System.out.print("Email : "); // user will type the email
                String emailSignUp = scanner.next(); // store the email
                System.out.print("Password : "); // user will type the pss
                String passSignUp = scanner.next(); // store the pasword

                // SQL_Util class => go for that Class file for detail
                // SQL_Util have initConnection() method that we can use
                // initialize the connection between this app and database(MySQL)
                SQL_Util.initConnection();
                // again , method from SQL_Util class
                // Basically, this method is to get the input from the user(username, email, pass) 
                // then , store it to the database
                SQL_Util.addUser(username, emailSignUp, passSignUp);

                System.out.println("\n  🥳 Welcome to the Yuu-Tube " + username + " 🥳");
                System.out.println("");
                // This is from FrontPage class, go for that class for detail and search choices() method
                FrontPage.choices();
                break; // importan to put break in case statement

            case "l":
                System.out.println("\nGreat 🚀");
                System.out.print("Email : ");
                String emailLogIn = scanner.next();
                System.out.print("Password : ");
                String passLogIn = scanner.next();

                // same like above
                SQL_Util.initConnection();
                // Basically, this command is like authorization process
                // which is to detect either that user is already signUp or not yet
                // That's why we need to pass in email and password
                // to check at our database, "is this user is already registered???"
                SQL_Util.isSignedUp(emailLogIn, passLogIn);
                // choces() method from FrontPage class
                FrontPage.choices();
                break;
            default:
                System.out.println("\n🚨 S or L word only 🚨");
                String answerAgain = scanner.next();
                signupOrLogin(answerAgain); // repeat the process
        }
    }

    // This is our choose method, we can access is with Console.choose()
    // Essentially, this method determine the page the user want to go
    // either to trending page or add new video or log out
    // But I still not implemetn the 2 - 6 page, right now , just have 1, which is go to Trending page only
    public static void choose(int answer){
        switch (answer) {
            case 1:
                // go to trending page
                FrontPage.trending();
                break;
            default:
                System.out.println("Choose [1 - 6] only 😊");
        }
    }
}

FrontPage.java

package yuu.tube;

import java.util.Scanner;

// FrontPage class
public class FrontPage {
    private static Scanner scanner = new Scanner(System.in); // scanner private variable to store scanner stuff

   // I just hard coded the Trending Video Title name
   // not from algorithm
   // Why have "_" ?? because Java can't read file that have empty in between 
   // for example : "Do you love me (Boston Dynamics)" <= Java can'r read this
   // That's why I put "_" in between
    private static String trend1 = "Pink_Sweat$_At_My_Worst_(Officil_l_Video)";
    private static String trend2 = "Do_you_love_me_(Boston_Dynamics)";
    private static String trend3 = "Can't_Get_You_out_of_My_Head_(Cover)_AnnenMayKantereit_x_Parcels";
    private static String trend4 = "Cat_Vibing_To_Ievan_Polkka_(Official_Video_HD)_Cat_Vibing_To_Music_Cat_Vibing_Meme";
    private static String trend5 = "Starship_SN8_High_Altitude_Flight_Recap";

    // hi method in FrontPage class => FrontPage.hi()
    public static void hi(){
        System.out.println("");
        System.out.println("🔥🔥 Welcome to Yuu-Tube v1.0  🔥🔥\n");

        System.out.println("Trending on Yuu-Tube");
        System.out.println("1️⃣ Pink Sweat$ At My Worst (Official Video)");
        System.out.println("2️⃣ Do you love me (Boston Dynamics)");
        System.out.println("3️⃣ Can't Get You out of My Head (Cover) AnnenMayKantereit x Parcels");
        System.out.println("4️⃣ Cat Vibing To Ievan Polkka (Official Video HD) Cat Vibing To Music Cat Vibing Meme");
        System.out.println("5️⃣ Starship SN8 High Altitude Flight Recap");

        System.out.println("");
        System.out.println("What are you up to now ? 🏖");
        System.out.println("✅ Sign Up (S)\n✅ Log in  (L)");
        System.out.print("Please select [S or L] : ");
    }

    // trending method in FrontPage class => FrontPage.trending()
    public static void trending(){
        System.out.println("");
        System.out.println("🔥 Trending on Yuu-Tube");
        System.out.println("1️⃣ Pink Sweat$ At My Worst (Official Video)");
        System.out.println("2️⃣ Do you love me (Boston Dynamics)");
        System.out.println("3️⃣ Can't Get You out of My Head (Cover) AnnenMayKantereit x Parcels");
        System.out.println("4️⃣ Cat Vibing To Ievan Polkka (Official Video HD) Cat Vibing To Music Cat Vibing Meme");
        System.out.println("5️⃣ Starship SN8 High Altitude Flight Recap");
        System.out.println("");
        System.out.print("Please choose [1 - 5] : ");

        // get the input from the user [1 - 5]
        int chooseVideo = scanner.nextInt();
        chooseTrendingVideo(chooseVideo);
        // this method is from below , chooseTrendingVideo, see below method

        // After the Vido is pop out, this prompt will come out
        System.out.print("Do you want to watch more ? y | n : ");
        String answer = scanner.next(); // store the user answer y/n

        // swith case , if y do something, if n do something.
        switch (answer.toLowerCase()){ // lowercase the answer if input is Uppercase like Y or N
            case "y":
                System.out.print("Please choose [1 - 5] : ");
                chooseTrendingVideo(scanner.nextInt());
                break;
            case "n":
                // if not , this prompt will come out
                System.out.print("Back to Homepage ? y | n : ");
                String result = scanner.next();
                if (result.equals("y")){ // if result is equal to "y"
                    // this choices method is from below, go down and see
                    choices();
                    int userChoose = scanner.nextInt();
                    
                    // This is from Console Class that have choose method, go to that class file for detail
                    Console.choose(userChoose);
                }
                break;
            default:
                // if user give wrong input , this prompt will come out
                System.out.println("y | n only 😊");
        }
    }

    // method in Frontpage => FrontPage.chooseTrendingVideo(...)
    public static void chooseTrendingVideo(int numberVideo){ // need to get the number video
        // switch class to open the video
        switch (numberVideo){
            case 1:
                // This is OpenVideo Class that have trendingVideo method, go to that Class File for detail
                // Basically, it open the video based on the trendng number video
                OpenVideo.trendingVideo(trend1);
                break;
            case 2:
                OpenVideo.trendingVideo(trend2);
                break;
            case 3:
                OpenVideo.trendingVideo(trend3);
                break;
            case 4:
                OpenVideo.trendingVideo(trend4);
                break;
            case 5:
                OpenVideo.trendingVideo(trend5);
                break;
            default:
                System.out.println("Choose [1 - 5] only 😊");
        }
    }

    // method in FrontPage => FrontPage.choices()
    // User HomePage
    public static void choices(){
        System.out.println("");
        System.out.println("-----------------------------");
        System.out.println("[ 1 ] 🔥 Watch Trending");
        System.out.println("[ 2 ] 🛠 Add New Video");
        System.out.println("[ 3 ] 🌈 Watch my Video");
        System.out.println("[ 4 ] 🚀 Search Video");
        System.out.println("[ 5 ] 💁 Edit account");
        System.out.println("[ 6 ] 😔 Log Out");
        System.out.println("");
        System.out.print("Please choose [1 - 6] : ");
    }
}

Main.java

package yuu.tube;

import java.util.Scanner;
import java.sql.*;

public class Main {
    public static void main(String[] args) {

        // front page
        FrontPage.hi(); // from FrontPage class

        // SignUp or Login function
        Scanner sc = new Scanner(System.in); // Get the user input => s/l
        String answer = sc.next(); // store the input
        Console.signupOrLogin(answer); // Sign Up or Log in Process
        // from Console class

        // Choices page
        int userChoose = sc.nextInt();
        Console.choose(userChoose);

    }
}

OpenVideo.java

package yuu.tube;

import java.awt.*;
import java.io.File;
import java.net.URI;

// OpenVideo class 
// This is our important features in our app => to open video
public class OpenVideo {

        // methond in OpenVideo class, => OpenVideo.trendingVideo(...)
        public static void trendingVideo(String trendNumber){
            // we need to wrap this code in try/catch block
            // First , we try the code in try block
            // if it get an error, the catch block will catch tha error and print it in terminal
            try {
                // string path of my video file in my laptop
                // I use concatination which is the concept of adding some string
                // for example , the result will be;
                // "/Users/amirulasyraf/Documents/video/" + trendNumber + ".mp4"
                String path = "/Users/amirulasyraf/Documents/video/Do_you_love_me_(Boston_Dynamics).mp4"; 
                // File class in Java to handle file stuff
                File file = new File(path); // we pass file path to the file object
                // Desktop class in Java to interact with my laptop or your pc
                Desktop desktop = Desktop.getDesktop(); // get my laptop configuration, sth like that
                // open method in Desktop class
                // which is , open that file
                desktop.open(file);
            } catch (Exception e){
                // if anything error in try block, print the error
                e.printStackTrace();
            }
        }

}

SQL_Util.java

package yuu.tube;

import java.sql.*;

// SQL_Util class
// This class is basically , do some interaction with our database
// is like a third party between our app and MySql database
public class SQL_Util {
    // This is my database path, for now , just ignore
    public static final String credentials = "jdbc:mysql://localhost:3306/YoutubeDB?user=root&password=password&useSSL=false&useLegacyDatetimeCode=false&serverTimezone=UTC";
    static Connection connection = null;
    // Connection class , special in SQL Java
    // it will turn true if connection is happen

    // method in SQL_Util class => SQL_Util.initConnection()
    // initialize the connection between our app and database
    public static void initConnection() {
        if (connection != null){ // if connection is ok, it will return true, if connection is true or false, not null
            System.out.println("[WARN] Connection has already been established.");
            // I just print the connection is establised
            // means, our app is connected with database
            return;
        }
        try {
            // all this stuff is just to make a connection with database
            Class.forName("com.mysql.cj.jdbc.Driver");
            connection = DriverManager.getConnection(credentials);
//            System.out.println("Yey, connected to YoutubeDB");
        } catch (ClassNotFoundException | SQLException e){
            // if error, print that error
            e.printStackTrace();
        }
    }

   // method is SQL_Util class => SQL_Util.addUser(.....)
    public static void addUser(String username, String email, String password){// nedd to pass all that stuff
        // we need to wrap it in try/catch block
        try {
            // Basically , this is an SQL command in Java syntax
            // we want to add the username, email and password to our database 
            // all this "INSERT....." is saying that ;
            // insert these username,email and passw to user database (which you guys see our User Database)
            PreparedStatement ps = connection.prepareStatement("INSERT INTO user(username, email, password) VALUES(?,?,?)");
            ps.setString(1, username);
            ps.setString(2, email);
            ps.setString(3,password);
            ps.execute();
            ps.close();
        } catch (SQLException e){
            e.printStackTrace();
        }
    }

    // method in SQL_Util class => SQL_Util.addVideo(...)
    public static void addVideo(String title, int likeCount, int dislikeCount){
        try {
            // same like before, we want to add new video to our database
            // insert that video details in our database
            PreparedStatement ps = connection.prepareStatement("INSERT INTO video(title, likeCount, dislikeCount) VALUES(?,?,?)");
            ps.setString(1, title);
            ps.setInt(2, likeCount);
            ps.setInt(3, dislikeCount);
            ps.execute();
            ps.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

   // method in SQL_Util class => SQL_Util.addVideoToUser(...)
    public static void addVideoToUser(int uid, int vid){
        try {
            // Let us think about the YOutube, essentially , every user must have a video assouciated with them right ?/
            // so , this is telling that, add this video id to that user id
            // user1
            //   |_video1
            // I hope you understand it
            PreparedStatement ps = connection.prepareStatement("INSERT INTO VideoUser(uid, vid) VALUES(?,?)");
            ps.setInt(1, uid);
            ps.setInt(2, vid);
            ps.execute();
            ps.close();
        } catch (SQLException e){
            e.printStackTrace();
        }
    }

    // this method is related to above method(addVideoToUser)
    public static int getUid(String username){
        try {
            // think of above method(addVideoToUser), how we want to get the user and video Id ??
            // we can do this in SQL syntax
            // this method is telling that , I want the id for that username
            PreparedStatement ps = connection.prepareStatement("SELECT * FROM user WHERE username=?");
            ps.setString(1, username);
            ResultSet rs = ps.executeQuery();
            if (rs.next()){
                int UID = rs.getInt("uid");
                ps.close();
                rs.close();
                System.out.println("UID for " + username + " : " + UID);
                return UID;
            }
        } catch (SQLException e){
            e.printStackTrace();
        }
        return -1;
    }

    // this method is related to above method(addVideoToUser)
    public static int getVid(String title){
        try {
            // think of above method(addVideoToUser), how we want to get the user and video Id ??
            // we can do this in SQL syntax
            // this method is telling that , I want the id for that video title
            PreparedStatement ps = connection.prepareStatement("SELECT * FROM video WHERE title=?");
            ps.setString(1, title);
            ResultSet rs = ps.executeQuery();
            if (rs.next()){
                int VID = rs.getInt("vid");
                ps.close();
                rs.close();
                System.out.println("VID for " + title + " : " + VID);
                return VID;
            }
        } catch (SQLException e){
            e.printStackTrace();
        }
        return -1;
    }

  // this method is simple version of authorization in Java
  // we want to check if the user is already registered or not
    public static void isSignedUp(String email, String password){
        try {
            PreparedStatement ps = connection.prepareStatement("SELECT uid FROM user WHERE email=? AND password=?");
            ps.setString(1,email);
            ps.setString(2,password);
            ResultSet rs = ps.executeQuery();
            if(rs.next()){
                int isExist = rs.getInt("uid");
                String stringIsExist = Integer.toString(isExist);
//                System.out.println(stringIsExist);
                if (!stringIsExist.equals("null")) {
                    System.out.println("Welcome back 👋");
                } else {
                    System.out.println("you need to Sign Up first 😊");
                }
                ps.close();
                rs.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

TryAnotherVideoFormat.java

package yuu.tube;

import java.awt.*;
import java.io.File;

// class for open other video format => AVI/FLV/WMV
public class TryAnotherVideoFormat {
    public static void main(String[] args) {
        try {
            String path = "/Users/amirulasyraf/Documents/video/avi/Bear_In_The_Woods.avi"; // change this path to your path file name
            File file = new File(path);
            Desktop desktop = Desktop.getDesktop();
            desktop.open(file);
        } catch (Exception e){
            e.printStackTrace();
        }
    }
}