>>251395you fucked it up, anon. live stream downloads:
streamlink --hls-live-restart url best -o filename.ts
youtube-dl --write-thumbnail --write-description --hls-use-mpegts --no-part url
mpv url --stream-record=file.ts
for members streams, all of these work with a cookies.txt that you can get most easily from a firefox plugin.
without doing .ts, if you would have let the youtube-dl run for about ten minutes, I believe it would've safely ended and given you a usable file.
with .ts, you'll want to ffmpeg -i file.ts file.mp4 to get something more usable