Hi there, i am kind of new to this so please be patient! 
My problem:
After i installed TVheaded from the OSMC appstore i rebooted my RPi2. After that i wanted to watch a movie out of my library, but just got a black screen.
I have tried a few so far, but mostly get a black screen. 1 movie gave me sound but no video. Everything else works just fine (scrolling trough menuās ect).
I also uninstalled TVheaded because video playback stopped working after i installed that app. But still nothingā¦
Please help! 
Did you try to play anything before installing TVheadend? Do you have mpeg2 codec installed? What kind of files are these.
everything has worked fine for 2 days (that is how long i have the RPi2).
I had just watched a tv show. then installed tvheaded, after that i tried to watch a movie and did not work anymore (tv shows , moviesā¦ nothing).
Most of the files are .mp4 container / x264.
EDIT:
Ok, now the whole OSMC is tripping ballzā¦ graphics dissapear, system āhangsā ect.
going to do a clean install and see if that helps.
Create a debug log which demonstrates the issue then provide the resulting paste url here please.
Just whiped the sdcard, and reinstalled OSMC.
Scanning library now. Have tested a few videofiles already and works again.
If it happens again i will upload LOG files like you asked.
Thanks for your reply 