VideoDome only support .mp4,.webm和.ogv?

i want to play the rtmp,but it is unuseful

The thing is that the video dome support any supported format from the VideoElement tag. So if you provide a video element able to decode your feed, this would work in the VideoDome.

For other formats like hls or dash you could rely on video.js for instance where we have a plugin for 360 : Amp 360 Video - Babylon.js Documentation