Every now and then I like to hunt around YouTube for fun Sesame Street clips to post, like my favorite “Bert’s Blanket,” or that fantastic Steve Wonder performance of “Superstition.” The quality is often spotty, and the clips, sometimes pulled from VHS tapes I imagine, are grainy. Now comes news from essential daily read MuppetCentral.com that Sesame Workshop has launched an official streaming video site (and “Bert’s Blanket” is on it). The video archive at http://video.sesameworkshop.org includes hundreds of clips from the show’s first season in 1969 to today. I searched to no avail for R.E.M. singing “Shiny Happy People.” Maybe music clips are coming.