You can simply reencode the result of a low bitrate test using high bitrate H.264. It would take more bandwidth of course but the visual result would be more or less the same.

Also a webassembly decoder could probably do short clips.

No one has yet written a good performant decoder for native, let alone Wasm.

I don't dispute that it is theoretically possible - of course it is, people are making this codec for actual use, and I'm looking forward to it - just that it doesn't seem doable right now.