Question [Q] Cubot GT99 / XYZ X1 --samsung note3 ported rom - youtube

Hi there, i had found a topic about the roms for this phone but i cannot post to that

this is the ROM i have used:
from needrom - cubot-gt99-galaxy-note-3-rom
The problem (as far as i can find now) is that youtube plays the sound of the movies, but the picture freezes after about 2 or 3 seconds.

Is there any fix for this ?? i really like the samsung roms, i've tried them all that i could find on needrom.com but all samsung roms seem to have the issues with youtube ?!?!
the youtube app version i use is the latest available on playstore - 5.9.0.13
the flash version is adobe flash player 11.1

thanks for helping me !