YoutubeMP4Playlist.py

import re, os, time, urllib.request, urllib.error, pytube

video_file = "video_list.txt"
path = "Video"
url = "https://www.youtube.com/playlist?list=myplaylist"

if not os.path.exists(path):
    os.mkdir(path)

def get_playlist(url):
    amp = 0
    final_url = []
    if 'list=' in url:
        eq = url.rfind('=') + 1
        cPL = url[eq:]   
    else:
        print('Incorrect Playlist.')
        exit(1)
    try:
        sTUBE = str(urllib.request.urlopen(url).read())
    except urllib.error.URLError as e:
        print(e.reason)
    tmp_mat = re.compile(r'watch\?v=\S+?list=' + cPL)
    mat = re.findall(tmp_mat, sTUBE)
    if mat:
        for PL in mat:
            yPL = str(PL)
            if '&' in yPL:
                yPL_amp = yPL.index('&')
            final_url.append('http://www.youtube.com/' + yPL[:yPL_amp])
        all_url = list(set(final_url))
        i = 0
        file = open(video_file, "w", encoding="utf-8")
        while i < len(all_url):
            file.write(all_url[i].strip() + '\n')
            time.sleep(0.04)
            i = i + 1
        file.close() 
    else:
        print('No videos found.')
        exit(1)

if not 'http' in url:
    url = 'http://' + url
get_playlist(url)

with open(video_file) as file:
    for line in file:
        pytube.YouTube(line).streams.filter(subtype="mp4").filter(progressive=True).first().download(path)