It's a trailer for the (fake) movie Wax On, Fuck Off starring Ralph Macchio. The title is of course mocking the famous line, "Wax on, wax off" from The Karate Kid, which Macchio starred in as Daniel LaRusso.
If you're a huge fan of The Karate Kid(not the new one, and no way I will see it) like I am, there's a few moments that you'll particularly enjoy. Anyway, this is brilliantly done... check it out for yourself:
I totally wish this were a real movie.

