Because they're perfectly executed to look exactly like 1) hip-hop and 2) sk8r videos so they will get the attention of the target market. Because they don't lose sight of their client or the product being marketed while doing so. And because they manage to do both with a sense of humour. That's a very difficult trifecta. Advertising to the youth market is a minefield. Often you see advertisers simply co-opt elements of the culture and hope some of it rubs off, but instead it's obvious and painful to watch. Either it's embarrassing or insulting. These ones have just enough of a sense of humour to them to be appealing.

Really, what else do you want from an ad except to deliver the message the client wants to say in a way that the intended target is willing to accept?