I have LG KU990R which is one of the very first youtube supported handset, when i was on warid youtube streaming was okay! but on zong i am not able to get it working, i have tried changing all the settings and on the other hand zong says its problem with your handset
Okay Got it working,
For Streaming you need to select the APN : zonginternet and disable any streaming proxies on it!
dat was quick