I think, every website or blog should use iframe code to embed Youtube videos. Why?..because i can play it with HTML5 player in my IOS Device..haha
I just try the iframe code on my own other blog..link
“Better late than never …”
Default WordPress theme with HTML5
Just activated TwentyTen Five theme on my WP 3.1. The HTML5 version of the default WordPress theme, TwentyTen.