Comment # 3 on bug 106519 from Christian König

> $ mpv --hwdec=vaapi Downloads/WE\ GOT\ INTEL\'S\ PROTOTYPE\ GRAPHICS\
> CARD.webm 
> Playing: Downloads/WE GOT INTEL'S PROTOTYPE GRAPHICS CARD.webm
>  (+) Video --vid=1 (*) (vp9 3840x2160 29.970fps)
> Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object
> file: No such file or directory

"--hwdec=vaapi" and "Failed to open VDPAU backend"? Could it be that you have a
setting which says to use VDPAU for displaying?