VLC 2.2.2 exhibits a known bug with VDPAU-VA-GL. Update to VLC 2.2.3 (or Debian's 2.2.2-5) if you use the later.
That being noted, if your problem exists with MPV, then that is some other bug. Something is wrong either in VAAPI hardware drivers, or in VDPAU-VA-GL. Please reassign.
VLC 2.2.2 exhibits a known bug with VDPAU-VA-GL. Update to VLC 2.2.3 (or Debian's 2.2.2-5) if you use the later.
That being noted, if your problem exists with MPV, then that is some other bug. Something is wrong either in VAAPI hardware drivers, or in VDPAU-VA-GL. Please reassign.