Earlier when YouTube was testing high resolution videos, we posted a hack to view YouTube videos in high quality by simply appending a parameter to the existing url, but there is no need for such hack now as YouTube provides option to view the high quality version of the video, However, YouTube still does not provide any method to let users embed high quality version of the video on there blog or website, but using the hack below you will be able to embed high resolution Youtube videos.

For the hack to work you will need to append &ap=%2526fmt%3D18 to the end of video clip’s URL's specified in “param” and “embed” tags in the default embed code provided by YouTube. For Example: