[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)

import sys

for line in sys.stdin:
    if not line.startswith('[youtube]'):
        print(line)