Muppets: You philistines need to LEARN

[A Black Falcon]

A few of those were amusing, sure. Others weren't. The first one (from Sesame Street - Cookie Monster I know! :) ) and the Muppet Treasure Island intro were probably the best ones, and the second video probably the worst (that wasn't funny at all). The others are in between -- some of the little skits with the two old guys were mildly amusing, though it wasn't that funny overall.

I did watch Sesame Street sometimes as a kid so I'm sure I saw muppets there at least... but as for the Muppet Show, while I imagine I saw some episodes sometime, it's not something I cared about enough to remember much at all.

As for the song parody, I presume it would help to care about and know anything beyond the name of the song they are parodying, but I, of course, don't.