Youtube – How to force 480p video quality in embed link /

Append the following parameter to the Youtube-URL:

144p: &vq=tiny
240p: &vq=small
360p: &vq=medium
480p: &vq=large
720p: &vq=hd720

For instance:

src="http://www.youtube.com/watch?v=oDOXeO9fAg4"

becomes:

src="http://www.youtube.com/watch?v=oDOXeO9fAg4&vq=large"