I have figured out a way to get YT working like it was before the ad change...I like many of you didnt want to uninstall flash on my comp so all I did was download firefox heres the website
http://www.mozilla.com/en-US/firefox/ Its like another Internet explorer but better
I downloaded it to my desktop and then double clicked on it and installed...it was really fast. I am on aol so instead of going on YT through aol I just open up firefox and do a search on that for YT. hope it helps!