computer or network may be too slow..
this can help you... Use 'zillatube'
It helps you downloads the videos and view them offline at full screen better, if needed.
You can convert to good quality mpg file format, then play it full screen using windows movie player.
It works very well.....just google search for 'zillatube'
http://www.google.com/search?hl=en&q=zillatube&btnG=Google+Search&meta=
==============================♥♥♥