You are correct. "The smaller the better" and "for a promo dvd" don't really go together. I have a Flip Mino HD that fits very nicely into my shirt pocket. I use it for all sorts of stuff and am please with the quality of the video. It's great for filming the kids, wildife, and works well indoors. I couldn't say its up to doing a promo dvd though. If you really want the quality in a small package it takes some $$$$