[youtube] Nq2wYlWFucg: Downloading webpage [youtube] Downloading just video Nq2wYlWFucg because of --no-playlist [youtube] Nq2wYlWFucg: Downloading m3u8 information [youtube] Nq2wYlWFucg: Downloading MPD manifest https://manifest.googlevideo.com/api/manifest/hls_playlist/expire/index.m3u8 # remove the lines starting with [youtube] from stdout (no function)

from subprocess import Popen, PIPE, STDOUT

f = open('youtube_download.out', 'w')
out = Popen(["youtube-dl", "Nq2wYlWFucg"], stdout=PIPE, stderr=STDOUT)
for line in iter(out.stdout.readline, b''):
    f.write(line.decode('utf-8'))