Example on how to make an video player using the native HTML <video> in Vaadin 14.

readme.txt

This is an example on how to create a custom component in Vaadin 14 to make the HTML native <video> tag available from Java.

You have to add the Video.java file below to your project, where after you can do `new Video(src);` to embed videos.

I only implemented the src attribute to be dynamic, and added that the controls property should always be on. 
Similarly you can add other properties like autoplay, loop, and muted. 
Check https://www.html5rocks.com/en/tutorials/video/basics/ for info on what attributes are available in <video>.
If you need more example code, check from com.vaadin.flow.component.html.Image how things are done there.

Video file is placed in my spring boot app under META-INF/resources/img/video.mov.
Check https://stackoverflow.com/questions/57553973/where-should-i-place-my-vaadin-10-static-files/57553974#57553974 
for where static files should go.

ExampleView.java

package com.vaadin.example.views;

import com.vaadin.example.components.Video;
import com.vaadin.flow.component.html.H1;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;

@Route("example")
public class ExampleView extends VerticalLayout {

    public ExampleView() {
        H1 header = new H1("My awesome video player");
        Video video = new Video("img/video.mov");
        add(header, video);
    }
}

Video.java

package com.vaadin.example.components;

import com.vaadin.flow.component.*;

@Tag("video")
public class Video extends HtmlContainer implements ClickNotifier<com.vaadin.flow.component.html.Image> {

    private static final PropertyDescriptor<String, String> srcDescriptor = PropertyDescriptors
            .attributeWithDefault("src", "");

    public Video() {
        super();
        getElement().setProperty("controls", true);
    }

    public Video(String src) {
        setSrc(src);
        getElement().setProperty("controls", true);
    }

    public String getSrc() {
        return get(srcDescriptor);
    }

    public void setSrc(String src) {
        set(srcDescriptor, src);
    }
}

Screenshot of the view above.

How can we add <source> tag to it like below.

<video controls style="width:640px;height:360px;" poster="poster.png">
  <source src="devstories.webm" 
          type='video/webm;codecs="vp8, vorbis"' />
  <source src="devstories.mp4" 
          type='video/mp4;codecs="avc1.42E01E, mp4a.40.2"' />
  <track src="devstories-en.vtt" label="English subtitles" 
         kind="subtitles" srclang="en" default></track>
</video>

As I see it, <source> is a very similar tag as <video>. I haven’t tested this, but what I would do is make a very similar class, Source.java, which has @Tag(“source”), and a constructor that sets the src and type properties. Then the Video.java class would have a addSource(String src, String type) method which creates a Source instance with the parameters and attaches it to the Video object. I think attaching would be done with something like getElement().add(source.getElement()). Add or append, I don’t recall the API keywords by heart.

The Vaadin 8 example in the sampler shows how to embed videos hosted externally, is there a method to do that in 14 similar to what you have above?

How can we add <source> tag to it like below.

<video controls style="width:640px;height:360px;" poster="poster.png">
  <source src="devstories.webm" 
          type='video/webm;codecs="vp8, vorbis"' />
  <source src="devstories.mp4" 
          type='video/mp4;codecs="avc1.42E01E, mp4a.40.2"' />
  <track src="devstories-en.vtt" label="English subtitles" 
         kind="subtitles" srclang="en" default></track>
</video>

I'm working on a similar problem right now. Did you manage to make any progress on adding subtitles to your video in this manner?