It is still happening for me that the screen gets black after 2 minutes of playback in DragonPlayer 20.12.0 on Debian stable with KDE.
KDE Frameworks 5.78.0
Qt 5.15.2 (built against 5.15.2)
The xcb windowing system

I have screen locking set to 2 minutes. I guess locking was enabled by default and i want it like that.
More detailed explanation is here: Black screen during video playback (kind of screen saver)

https://bugs.debian.org/cgi-bin/bugrepo ... bug=579272

Should this be reported somewhere (where?) if this software is still developed?