On Windows Vulkan video would work. But not on macOS (that mpv thread mentions it).
On Linux it should be a better option than VAAPI once drivers will support it. Since Firefox is using ffmpeg anyway, it probably shouldn't be too hard to make it an option.
On Linux it should be a better option than VAAPI once drivers will support it. Since Firefox is using ffmpeg anyway, it probably shouldn't be too hard to make it an option.