It's been deleted from archive.org. The uploader made it sound like it was their decision, but the reality is they are probably worried about legal consequences
Dycaite (owner and founder of the Lost Media Wiki) must've contacted him and asked him to take it down, cause someone must've had a talk with dycaite about basically not sharing the leaks within the lost media community.
At this point, all this is a crazy overreaction to some clips that aren't even "scary". The best guess I can give is they haven't cleared the rights
yet cause they don't want to release it.
MoMI and SW: (pursuing the leak) "ALL RIGHT, WHO LEAKED EP #847 ONLINE!!!?? HUH!!?!? HUH!!!???" (looks at the archive.org page) "Whew. It's gone, but still, we're pursuing the user who leaked it." (calls FBI and starts investigation)
You just made this up, right?
I refuse to believe the FBI would get involved in something as trivial as an obscure Sesame Street episode when there are actually real problems in this world.
Honestly, this could be a case where the controversy surrounding it is more interesting than the episode. Remember, how big a deal was the Lucy In The Sky With Diamonds cover was until it was revealed.
I actually really like the episode and just the leaked segment lived up to what I built up in my mind over the last five years... I mean, don't forget that this is the "tame" part of the episode... the kids weren't crying over Margaret Hamilton dressed as the old lady.
It also seems to have a humorous value beyond just the mythical "banned" status.