The recent exposure of these clips is interesting, I won't ask how they were obtained, but it seems like they weren't taken from an individual episode (or maybe they were taken from an incomplete copy of an episode... Which could explain why I'm Square appears to be cut off at the beginning), otherwise I think Surprise would have an EKA at Muppet Wiki by now. If they came from the Sesame Workshop vaults, then the quality isn't as good as all those rare season one, ten, twelve, twenty, and twenty-two episodes that mysteriously surfaced among fans a few years ago. Then again, I've read that Sesame Workshop converted every episode to newer tape formats every year until digitizing them in the late-1990s, maybe these come from older copies while the ones that surfaced a few years ago come from newer, better copies.
It's also interesting that most of these rare clips that have just surfaced are songs written by Tony Geiss. I know that he recently auctioned off his copyright on the songs, but I wonder if he had video copies of the scenes that he sent out.