[sky76]

Are these specific video files, or everything you try ?

I have seen issues with another AMLogic platform that I compile OpenELEC distributions for, the C1+
Issues with HDMI cables with ARC or Ethernet channels in them causing HDMI EDID Checksum errors which then lead to further Kodi playback problems.

But as the WeTek Core comes with its own HDMI cable this would rule that problem out.
Are you using the supplied WeTek HDMI cable ?

Hi Thnaks again. My plasma is 3 years old and hasnt got a lot of options to check but has 24p smooth film.
I dont use HDMI cable from my Core but that will be the first thing that I will do. I have been useing few different HDMI cabels but not the cores one. Hope that will help, but...