Tversity no audio youtube

I have 2 questions.

  1. How to stream youtube in HD on my xbox.
  2. How to fix no audio problem.
    (video playing, but sound goes not from my tv, it is playing from my PC)

When i reboot xbox sound is playing from TV (only 1 video), then from my PC.

Regarding #1 only SD is supported at the moment.
Regarding #2, we are looking into that and will release a patch as soon as we can reproduce this.