Embedding failed but worked on other instance

Hi, I’m trying to embed a PeerTube video from my server to my Mozilla Hubs server.
Somehow it doesn’t work with mine but with another server it does.

How can I know what settings in the PeerTube configuration were changed in order to make it work with Hubs?

My bet is on lack of HLS or low resolutions.

PS: I’m confident it’s PeerTube specific rather than Hubs because I saw the same behavior in other Hubs servers.