Each video starts as a semi-earnest look at the craft of acting, but it swiftly devolves into sibling rivalry and bickering as only brothers can.
Dave has great, awkward timing a la Michael Cera and oddly expressive eyebrows.
Although I can't figure out how to embed the video, you may also enjoy a series of videos called "Living 'Neath the Law with Jack McBrayer". This wholesome-looking actor (from 30 Rock among other things) teaches you a variety of skills, such as ripping off a drug dealer, or conducting a home invasion.
Be warned about language, if you are concerned with that sort of thing.