If one watched "The Funniest Thing You've Ever Seen From Really Far Away" with the volume turned all the way up and the image zoomed in, you might decide "no, that wasn't the funniest thing I've seen." But you likely haven't seen many skits take place from very far away. Therefore, it's the funniest thing you've ever seen from really far away.
Due to just how strange the Do The Flop Guy's story is, you might not notice that the song is a vague retelling of the stories of many real life viral stars. Do The Flop Guy becomes famous on accident and the world becomes obsessed with his bit. When he tries to break away by doing a variation on it, he is unsuccessful and ultimately can only make his fans happy by doing the same thing. Of course, the context is completely bizarre.
The Deliberately Monochrome stick-figure look serves the material brilliantly because anything more complicated would distract from the utter weirdness of the jokes. The look isn't what matters, it's the jokes. Besides, plenty of gags like "Oh you stole my lungs" would be Body Horror if the people looked at all realistic.
This arguably becomes Ascended Fridge Brilliance (or Horror) in movie 10, where one gag has two fantastically modelled and animated 3D figures deciding to deliberately return to the monochrome 2D style, declaring "This is better." Probably for the best, because otherwise they start to resemble SCP-173.
In one episode, a skit shows what happens when the Monochrome is turned off. It reveals all the characters are naked and begin freaking out due to it and reverts back to Monochrome, so this is plausible.
Could also qualify as Fridge Horror depending on your perspective, but in movie 8 a woman complains about how bad her date with a baby is. In 9, we see a mother deciding that she and her son are Better as Friends. Could it be that there's a connection?
No one wants to eat Mr. Muffin because 1) he's a talking, suicidal muffin that makes people uncomfortable, and 2) he's probably stale by now.
asdfmovie12's opening implies that the Cow Pretending To Be A Man is actually female. This is double brilliance: 1. cows are female. Male cattle are called bulls (sometimes cow is used as a colloquialism but let's ignore that). 2. since this is a humanized version of the cow pretending to be a man, it'd make sense to gender-flip him if he was originally male as a cow...because if he was humanized and still male, he would no longer be pretending to be a man!