I shoot promotional videos and have actually created one myself Jeffrey Cook Videography Testimonial
I had a recent bride speak about my services and used b roll footage from her wedding as well as other weddings to show my work. What I really like shooting are “mom and pop” promotional videos. For one, they need your support, two you can negotiate a good price for the video. A few months ago I shot a promotional/mini documentary on Dusty Buns, a local bistro in Fresno. I had a great time doing it, and during the interview they announced they were expanding to San Francisco. You can usually shoot your promo in a few days, and since it is local you have more flexibility.
If you are starting out, you can do one or two promotional videos for free or next to nothing. By doing it for free you get the chance to try out new gear and sharpen your skills. There may be mistakes along the way, but remember the client is not paying, so you are actually catching those mistakes and learning from them at the same time.
I do suggest that you do a site survey of the establishment and see where your best spots to capture video are. Look for the best lighting and sit down with the owner and talk to them about their business. You’ll find out that just talking to them for a few minutes and building a rapport with them will ease their pressure. You will get a better on camera interview by building rapport with the owner as well.