Playback of videos bigger than screen size

Hi, I am a new user and so far like mabox a lot. What I observed yesterday was that I could not playback full hd videos. I tried the default player and vlc, both start to load the video but then suddendly close and there is no playback. Since smaller videos work, I suspect that this happens if the video has a higher resolution than my screen (1440x800), but this is just a guess.
Maybe I am doing something wrong or I need to configure something?
Best Regards, Andreas

First thing you can do is to run those programs from terminal.
Probably you will get some information about what is going on.

mpv path/to/your/video_file
or 
vlc ...

Ok, good hint. This is the output:

datacine@datacineD620 ~/Downloads $ vlc am.mp4
VLC media player 3.0.18 Vetinari (revision 3.0.13-8-g41878ff4f2)
[000056357218d550] main libvlc: VLC wird mit dem Standard-Interface ausgeführt. Benutzen Sie 'cvlc', um VLC ohne Interface zu verwenden.
[00007f4e4000d500] gl gl: Initialized libplacebo v4.208.0 (API v208)
[0000563572262890] main video output error: video output creation failed
[00007f4e60c0e950] main decoder error: failed to create video output
[00007f4e540019e0] gl gl: Initialized libplacebo v4.208.0 (API v208)
[00007f4e540019e0] gl gl: Initialized libplacebo v4.208.0 (API v208)
Speicherzugriffsfehler (Speicherabzug geschrieben)
datacine@datacineD620 ~/Downloads $ 
datacine@datacineD620 ~/Downloads $ mpv am.mp4
 (+) Video --vid=1 (*) (h264 1920x1080 25.000fps)
 (+) Audio --aid=1 --alang=eng (*) (mp3 2ch 48000Hz)
AO: [pulse] 48000Hz stereo 2ch float
VO: [gpu] 1920x1080 yuv420p
Speicherzugriffsfehler (Speicherabzug geschrieben)