Good Luck, most sites require flash and trust me your not the only one that has had frustrating problems with Adobe's plug-in.
Indeed version 10 has been a pain in my ass as well. And the unfortunate part is that 3 of my favorite sites do not allow you to do anything there unless you have Flash 10. Bummer. I wish they would test out their products more because Adobe is feeling the hurt right now.
I can currently watch: http://www.youtube.com/html5 Hopefully more of the site will use <video> in the future.