@jPV
I'm sorry I asked the question wrong,
OWB and Wayfarer work perfectly.

I meant if I use the mobile phone function to watch videos with the youtube app via "tv code".
also for example with this user-agent:
Mozilla / 5.0 (Linux; GoogleTV 3.2; NSZ-GS7 / GX70 Build / MASTER) AppleWebKit / 534.24 (KHTML, like Gecko) Chrome / 11.0.696.77 Safari / 534.24

the video is not played perfectly.