vids which consistently make both me and people I force to watch them laugh:

Another Sunday (SGA) by jescaflowne

Default (Drunk History) by kiki-miserychic

Dynamite (Brooklyn 99) by elipie

Happy and Proud (Teen Wolf) by Nerjaveika (I think this vidder was raised in the wilds of youtube so they don't follow a lot of fandom conventions and there's a bunch of spelling mistakes but my god the comedic timing of this vid is flawless)

Kinky Neighbors (Batman) by thingswithwings

Maneater (Harry Potter) by jarrow

Metaphor (multi-source) by flummery & cesperanza

Tonight I'm Fucking You (White Collar) by talitha78

The Undeserving Rich (Jeeves & Wooster) by Trutgras

What Makes You Beautiful (Merlin) by elipie