No answers so far? I tried the steps described in the following documentation, but it didn’t help. Firefox still shows the above screen with almost no hardware decoding and Clapper and VLC still don’t play h.264 encoded videos. Can someone please help? I really want to use Bluefin, but I’m getting frustrated with the “simple to use desktop with the mission of serving a mass audience”. 
If that matters, my video card is: AMD Radeon R9 200 Series (radeonsi, pitcairn, LLVM 17.0.6, DRM 3.57, 6.10.10-100.fc39.x86_64) als listed by Firefox.