“In this one-hour Christmas special, Fozzie Bear surprises his mother Emily on Christmas Eve by bringing the entire Muppet gang to her farm to celebrate the holidays. Doc and his dog Sprocket, who had planned a quiet Christmas, end up joining the Muppets in their holiday activities and preparations.”
How can Scooter have that Muppet baby film if Fozzie’s Mom has never met any of his weird friends before?
My theory is that they’re all actors playing parts (as is sometimes stated in Muppet stuff) and the scripts don’t have to be self-consistent.