Business success has a lot to do with being found online! You could have the best service or product in the world, but if customers can't find you, then you'll fail. Conversely, if you have the best marketing team, no matter what you'll sell, you'll do great!
I'm not a marketer, but in my own research, I find that Google favors videos over still images. So does Facebook, and we all know (or should by now) that Facebook is *the* place to advertise. If you don't know why, then drop me a line and I'll explain.
Anyway, here is an example of a great video testimonial I received today. Something to consider when posting videos is to give the file a file name using your best key words if you can. Google will automatically assume that the video is about your key word.