The problem was, that i had to reattach a new VideoView to the main layout like described here:
https://code.videolan.org/mfkl/libvlcsharp-samples/-/tree/master/ForegroundBackground?ref_type=heads
Although i think in MAUI its not possible to reattach a VideoView just like that, but i got it running with connecting the Maui Viewhandler with the Android.Widget.FrameLayout, a class that contains the VideoView. So I could replace the VideoView inside the FrameLayout without rewiring the Handlers.
(At least thats what i think is happening there).