Was working last week even with vp9:

vainfo output:
libva info: VA-API version 1.7.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_7
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.7 (libva 2.9.0.pre1)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 20.1.1 ()
vainfo: Supported profile and entrypoints
      VAProfileNone                   :	VAEntrypointVideoProc
      VAProfileNone                   :	VAEntrypointStats
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Simple            :	VAEntrypointEncSlice
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointEncSlice
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointEncSlice
      VAProfileH264Main               :	VAEntrypointFEI
      VAProfileH264Main               :	VAEntrypointEncSliceLP
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointEncSlice
      VAProfileH264High               :	VAEntrypointFEI
      VAProfileH264High               :	VAEntrypointEncSliceLP
      VAProfileVC1Simple              :	VAEntrypointVLD
      VAProfileVC1Main                :	VAEntrypointVLD
      VAProfileVC1Advanced            :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointEncPicture
      VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSlice
      VAProfileH264ConstrainedBaseline:	VAEntrypointFEI
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSliceLP
      VAProfileVP8Version0_3          :	VAEntrypointVLD
      VAProfileVP8Version0_3          :	VAEntrypointEncSlice
      VAProfileHEVCMain               :	VAEntrypointVLD
      VAProfileHEVCMain               :	VAEntrypointEncSlice
      VAProfileHEVCMain               :	VAEntrypointFEI
      VAProfileHEVCMain10             :	VAEntrypointVLD
      VAProfileHEVCMain10             :	VAEntrypointEncSlice
      VAProfileVP9Profile0            :	VAEntrypointVLD
      VAProfileVP9Profile2            :	VAEntrypointVLD


media-internals Stuff:

render_id: 24
player_id: 43
origin_url: https://www.youtube.com/
kFrameUrl: https://www.youtube.com/watch?v=tEK7GIefwZE
kFrameTitle: 
url: blob:https://www.youtube.com/28d56b05-cb4e-4d58-abc1-a85d8b4d578a
info: Selected video track: [1]
pipeline_state: kPlaying
kVideoTracks: [object Object]
kAudioTracks: [object Object]
kIsAudioDecryptingDemuxerStream: false
kAudioDecoderName: FFmpegAudioDecoder
kIsPlatformAudioDecoder: false
error: {"causes":[{"causes":[],"data":{},"stack":[{"file":"../../media/filters/decrypting_video_decoder.cc","line":53}],"status_code":264,"status_message":""}],"data":{"Decoder name":"DecryptingVideoDecoder"},"stack":[{"file":"../../media/filters/decoder_selector.cc","line":172}],"status_code":265,"status_message":""}
kIsVideoDecryptingDemuxerStream: false
kVideoDecoderName: VpxVideoDecoder
kIsPlatformVideoDecoder: false
event: kPlay
audio_buffering_state: [object Object]
dimensions: 1920x1080
kResolution: 1920x1080
video_buffering_state: [object Object]
pipeline_buffering_state: [object Object]
duration: 799.461