Actor Allusion: Occasionally some parodies, in an effort to show a character doing something without the use of their respective movie, will use footage of other projects which involved the actor who played them.
This was also done with Shailene Woodley, as she both played the role of Felicity Merriman in An American Girl Adventure and Alex King in The Descendants. Naturally, someone had to make a parody out of it. What's even bizarre was that of Felicity wearing modern clothing, in stark contrast to what she wore in the late 1700s.
Approval of God: In a 2010 interview with New York magazine, Downfall director Oliver Hirschbiegel found the parodies funny, and around the time of the interview saw 145 of them.
Executive Meddling: Downfall's distributor Constantin Films blocked the videos from YouTube at one point, though some of them are back up, as parody was ruled fair use. As stated above, the director actually enjoyed them.
Recycled Script: The parodies' depiction of Mallory would later become the basis for Unterganger HitchcockJohn to introduce the character of Firecracker in Dino Attack RPG. Firecracker (which came from a nickname Juan gave Mallory before learning his real name in his original film) took the idea of a psychotic demolitions expert with a coat full of explosives and ran it Up to Eleven. Sadly, it didn't turn out quite as successful.