IE9 delay rendering embedded youtube

I have an issue when using IE9 via tranperent WCCP redirect to websense. Whn accessing flash youtube that is embedded in this url is taking nearly 3-4 minutes to load. When using the same machine with compatibility mode enabled the page loads within seconds. Other browsers work fine IE8 and chrome.

The users are pointing to the network however PC and Mac OS work fine. It only happens with IE9. Once the video loads it appears to be working until you clear or delete your internet options.

It would be nice to get another similar URL to test with the same embedded youtube video to compare with IE9.