Rule #1: Get a tripod. “Documentary-style” shaky camera shots are comical at best and you will wind up looking like your Aunt Betsy filmed you as you performed for the twins' birthday party. You won't impress a prospective employer that way.
If possible, get your audition tapes done professionally. The expense will be repaid when you get twice as many gigs with a good tape as you could have with a bad one.