Play an HEVC .mkv or .mp4 file. Press during playback → check “Decoded format” shows I420 or NV12 (not “failed”).
Most Linux repos ship a VLC without proprietary HEVC support due to patent fears. To get exclusive hardware decoding: install hevc codec for vlc exclusive
sudo dnf install vlc-extras sudo dnf install libhevc-tools x265-libs Play an HEVC