A question about video support

Is it possible to add RTMP video to the post in form of the usual video player? For a live translation.
What is the best approach for that?

F.e. For RTMP from https://restream.io/

RTMP is usually used between the video producer and the central server. From the server to consumers it’s usually either DASH or HLS.

For your specific case, restream.io supports both Youtube and Twitch and we can embed both in Discourse out of the box:

Paste this in a single line an it becomes: