example pytube function for downloading youtube video

pytube_download_func.py

import os
import re
from pytube import YouTube

def downloadYtMp4(ytURL, dlDir=os.getcwd()):
    #find youtube video
    yt = YouTube(ytURL)
    #
    #filter to only mp4 files and take last in list (sorted lowest to highest quality)
    hqMp4 = yt.filter('mp4')[-1]
    #strip quality from video info.. example video info:
    m = re.search("- (\d\d\dp) -", str(hqMp4))
    #save quality capturing group
    quality = m.group(1)
    #
    #get mp4 video with highest quality found
    video = yt.get('mp4', quality)
    #download and save video to specified dir
    video.download(dlDir)

downloadYtMp4("https://www.youtube.com/watch?v=MvFcY9rTPx8")