Montage Parodies are basically a sub-genre of YouTube poop videos. They're mash ups of movies, TV shows, and other video and audio to create new stories, jokes or just weird visual patterns sometimes.

Montage Parodies started out a few years back with I'D SAY HE'S HOT ON OUR TAIL:

Not that funny, but it evolved to stuff like Lord of the Psychotic Shrimp:

Of the MontageParody style, these are the best:

Farming Simulator Mad Skill | No Plow | 360 Crop Rotation:

Soraka Pro Frags | MLG | No-Scope | Carry Hard:

Best Gank 2012 has me in tears within the first minute:

The king of /r/montageparodies is poopsteve420:

Also good:

Sometimes less is more:

The build up for this one is great:

Nice use of Snoop Dogg's "Smoke Weed Everyday" on that one.