When i first flashed your rom i had no sound on youtube but it was playing. THen i hard reset and it gave me the cannot play this video message. Keep trying to play different videos and then it started playing them with sound out of nowhere. But then my phone froze and did a soft reset that turned into a hard reset then youtube stopped working completly and phone kept freezing had to reflash. So Went to back to stock and now back to yours wish is the HD MAnilla im using. And everything is great since then minus the youtube. Seems like very hard problem to track down. When u get it to work hope its a version that lets u select quality
. Hope something here helps u narrow down problem