This is the best summary I could come up with:
That initial Vulkan Video support was catered to H.264 and H.265 while finally with today's Vulkan 1.3.277 release there is a new extension introduced for AV1 video decoding.
This much anticipated extension was worked on by AMD, Red Hat, Intel, NVIDIA, Collabora, and others.
You may recall that Mesa implemented its own AV1 decode extension as part of RADV prototyping AV1 video decode while now there is finally this cross-vendor extension.
There is no AV1 encode extension right now for Vulkan Video but for the vast majority of users it's the AV1 decode they are after anyhow.
The Khronos Group announced the AV1 decode extension as well as the Vulkan SDK update today.
Adding VK_KHR_video_decode_av1 is the most exciting change of Vulkan 1.3.277 while there is also various documentation clarifications/fixes.
The original article contains 167 words, the summary contains 130 words. Saved 22%. I'm a bot and I'm open source!