Jim Henson made this pitch video to sell The Muppet Show to CBS. It starts a bit slow but stick with it.
There's also a scene with Kermit right at the end which unfortunately didn't make it into the clip.
After Leo's powerful speech, Kermit appears from off-screen against a CBS logo and shrugs, "What the hell was that all about?"
And just because, here's the opening theme song of The Muppet Show. (via @gavinpurcell)