It's a bit of an edge case, but since we now allow the disabling of the software fallback it's possible to have a situation where hwdec completely fails and the mpv window is still lingering from the previous item in the playlist. What needs to happen is simply that the vo_chain should uninit itself and handle force_window if needed. In order to do that, a new VDCTRL is added that checks vd_lavc if force_eof was set. player/video will then start the uninit process if needed after getting this.