A redirect server to download audio from YouTube for e.g. podcast hosting

ytredirect.py

import os
from flask import Flask,redirect
from youtube_dl import YoutubeDL

ydl = YoutubeDL()
app = Flask(__name__)

@app.route('/<ytid>')
def hello(ytid):
    ytid = os.path.splitext(ytid)[0]
    url = 'https://youtu.be/'+ytid
    r = ydl.extract_info(url, download=False)
    # Use 139 for lower audio quality
    audioFormat = next((format for format in r['formats'] if format["format_id"] == "140"), None)
    audioURL = audioFormat['url']
    return redirect(audioURL, code=302)

if __name__ == '__main__':
    # Bind to PORT if defined, otherwise default to 5000.
    port = int(os.environ.get('PORT', 5555))
    app.run(host='0.0.0.0', port=port)