All the settings and names are translated from Italian by me, sorry if they don't precisely match the English version.
This issue has been here for a while, and I never got any answer to it:
When I set a video...
Xiaomi 9T Pro, weekly 20.10.15
Recent apps do not get rendered, unless scrolling from outside the screen.
Edit: it seems it has stopped, after some time using it
Actually, you can change the screen objects size in the accessibility menu, which effectively seems to alter the DPI of the screen. This still causes the same exact issue with the new control center. I am not sure making use of an accessibility feature makes this a user caused problem...
MIUI 12 20.7.9, Mi 9T Pro. Setting a video as wallpaper results in black wallpaper. Setting a video as wallpaper in lockscreen, and an image as wallpaper in home, results in lockscreen displaying the previously set static wallpaper.