investigate recording already started livestreams from the beginning

[mellowagain]

there is a way to force enable youtube dvr which would allow us to skip (may be irrelevant)

https://addons.mozilla.org/en-US/firefox/addon/force-enable-youtube-dvr/
https://github.com/ohareza/forcedvr

[mellowagain]

useful issue: https://web.archive.org/web/20200307022802/https://github.com/ytdl-org/youtube-dl/issues/11618
relevant repo: https://github.com/streamlink/streamlink (we might be able to replace ffmpeg with this)