This isn't real YouTube. These are YouTube Proxies and alternatives.
I have a bookmarklet on my Bookmarklets page that unblocks any YouTube video and also disables ads. Go back to my "Other" page click on Bookmarklets. Highlight and drag on the code and put it in your bookmark bar. Go to a video that says it is "Restricted" or if you want to disable ads. Then click on the bookmarklet in your book mark bar.