Here is a tummy tickling compilation video of Vines from Zach King, the magic wizard of Vine. He'll snatch cats out of computer screens, turn Rubik's Cubes into candy, fly through beds and doors, jump out of his clothes, magically change colours of any object and more. It's the most entertaining use of the 6 second medium because it's just short enough to make me feel like magic can be real.
The time limitation is perfect because King quickly sets up and executes a simple trick on you and then moves onto a completely different one before you can question what just happened. It's mindless fun.