SOLVED: Video playback in slow-mo

[MrFabou]

Try fiddling around with Refresh rate switching.  "Scale on device" is probably the most compatible option.

In fact, with "Scale on device" "the moon" works without any problems!

Black adam, however, has only improved slightly and is still not viewable.

Then it must be the movie itself.

I think the problem is solved for now, thanks!