Oh, hmm. That's a common resolution for old-fashioned MPEG (1) files, but for your purposes, you could just use your codec of choice and shrink the resolution again.
Your various video clips will wind up mimmicking VHS, DVD, and HDTV, respectively. If spending a few bucks is easier for you than learning how to rip & encode, you could buy/rent 3 copies of the same TV show or movie on tape, DVD, and BluRay.