I run a few live events using Streamyard that go directly to YouTube. The stream becomes the recording, so the link is always good.
I notice that Discourse does not seem to embed the different URL format YouTube uses for this videos giving a generic OneBox e.g.,
https://www.youtube.com/live/eJemwqO0SDw e.g.
whereas by manually using the same ID in a standard YouTube URL does work in Discourse
https://www.youtube.com/watch?v=eJemwqO0SDw renders as expected
YouTube does not readily provide this form of a live stream video as a share link, so I end up manually re-writing the URLs. Seems like some pattern matching magic could manage this?