IE Trusted Sites not working

I was playing with Trusted Sites in IE. I set the security settings: Internet to High and Trusted Sites to Medium. I added youtube to the Trusted Site. I went to watch a video and it said I had the javascript turned off, which shouldn't have been true since I added it to the Trusted list. What I didn't add to the Trusted list was the domain that the Javascript and CSS files were coming from, which was http://s.ytimg.com. In case you were wondering, I viewed the source of the site to find where the JS and CSS files were coming from. I added it to the list and viola, worked. Had the same issue with NFL.com but same solution worked.