Been watching constantly. I can't wait until they hit a billion and I can stop watching videos on Sesame Street's YouTube page. Can't wait to go back to watching clips on DVD, sesamestreet.org, and Sesame clips uploaded by other users!
I've watched (at least parts of) quite a few "word of the day" segments, and it's amazing how many hot female celebrities appear in those. Especially ones I've never heard of and didn't memorize the names of.
I've tried my best to limit the watching to only classic clips (I really want those to be responsible for the billion), but apparently I can't keep myself from watching newer clips. There are a lot of clips I've watched several times, like Do De Rubber Duck, Share It Maybe, C is for Cookie, Monster in the Mirror, all of the Monsterpiece Theater segments posted by Sesame Street, several News Flash and Waiter Grover clips, and more. I've often gone through playlists, and I wish there would have been playlists for Monsterpiece Theater and Sesame Street News.