* Sherief Alaa sheriefalaa.w@gmail.com [2013:12:12 19:32 +0200]:
Tom, You need to join the html5 video player beta test first and even after that not all videos will work. See:�[2]https://www.youtube.com/html5
Really? I have never need to specifically enable it.
Some videos don't automatically work, but if you go to share->embed, and get the embed URL, they do. But most videos I try work for HTML5 without enabling. Curious.