How to embed high quality video with new YouTube iframe style code

Question

I am using youtubes new iframe code to embed video but the videos seem to be lower quality than if I watch them on youtube. Is there a way to embed the high quality video?

Answer 1

Also, it seems that YouTube now automatically serves up the quality that it thinks is optimized for the size of the embed, for iframe and AS3, regardless of whether or not the HD parameter is set.

See this post, and this for more information.

UPDATE: See Jason Renaud's answer for a good method that allows explicitly forcing the quality type. I tried it with an HTML5-embedded player, and it worked as expected.