You people need education.
Basically, these are a parody of the constant gameplay montages people upload to YouTube, claiming to be "MLG" (Major League Gaming, in other words "Professional). The creators of said montages usually displayed foul behaviour, telling people to "get on their level".
These videos were created to mock the creators of the original montage. Basically, they use the over-the-top camera tricks, colour filters, text, constant camera cuts, zoom in and outs etc, that original montage makers use, but of course, these guys go WAY over the top, and then use 1337-5p34k and whatnot in the description to parody the behaviour of the montage creators.
These things are always hilarious. Especially considering they usually use slower-pace games like Farm/Train/Fork-Lift Simulator and even Internet Explorer.