Force youtube embed to start in 720p

Question

There are a few methods suggested for doing this online, but none of them seem to work.

For example:

http://blog.makezine.com/archive/2008/11/youtube-in-720p

Answer 1

(This answer was updated, as the previous method using vq isn't recognized anymore.)

Specifying the height of the video will change the quality accordingly. example for html 5;

If you don't want to hardcode the width and height you can add a class to the iframe for css media queries.

Tested on a working server + passes the w3.org nuhtml validator.