https://bugs.winehq.org/show_bug.cgi?id=56314
--- Comment #1 from Christopher Thielen cthielen@gmail.com --- This doesn't appear related to video playback after all. I have also seen it occur in DX9 games going fullscreen with no video playback.
It also doesn't appear to happen in X11, only Wayland, on Fedora 39, Intel open source GPU drivers. So perhaps a Wayland windowing issue?