I just reproduced a problem which I described before in this post (only 1/5 of screen is DV video and other 4/5 is blinking random color).
It starts to show up when I switch to “ON” option “Disable GUI scaling” and reboot Ugoos after it.
Skin is pretty good on 4k display with this option but DV videos playback will break.
@TheCoolest, check it please.