but mpv uses the very same ffmpeg version and hardware acceleration is working there as i have shown. are you sure i need to replace the default ffmpeg with anything unofficial? note that i cannot uninstall (the latest) ffmpeg because firefox itself depends on it.
i wish i could workaround by using a different browser for videos, but now vivaldi and chromium aren’t usable in wayland anymore (they worked until recently) and switching to x11 just results in choppy video everywhere.
now i’m completely clueless 