If you're on IE, click the +star button on the top left by the tabs,
In Firefox I don't remember what it is, but I think there's an "add to favorite" menu option
In Chrome, the button is right to the left of the address bar.
I'm in Firefox with a bunch of tabs open. One of the the tabs was on the google website and I was logged in to my Google account. As soon as I logged out, I went back to Youtube and created an account and then linked it to my Google account. I marked the video as a favorite and it worked fine! Thanks much for your help!
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