Youtube buffering very slow

[Heavyrain]

Hello ipadforums members, I have a very stressful issue with the youtube on the ipad (both the native app or the html5 webapp) : I can usually watch the first 10-30 seconds of the video, but then, the video stops every 2seconds to buffer. It absolutely impossible to watch to a video longer than 1 minute. I have no clue if the issue is the ipad itself (probably not, the same problem happens with my ipod touch 3rd gen), my ISP/DNS (speedtest: 10mb/s download 1mb/s upload, tried openDNS and google dns), or in youtube itself. The issue started yesterday at about 10:00 pm. Thanks for any help

P.S. ipad 2, 16Gb, ios 4.3.3 jailbroken, LOTS of tweaks installed (yourtube HD too) :thumbs:

Sorry for my bad english