A culinary store wants me to do some video tutorials (short, maybe 5 minutes each tops) for some of their products that they have on their online catalogue/website. Idea would be customer would browse the catalogue and click on the tutorial for whatever the product/tool might be. I have a decent video camera but know very little about editing, though I think I can teach myself the basics. I've seen lots of video tutorials and believe I can do this, thing is I have no idea what or how to charge. Also, I can benefit from doing these tutorials as self-promotion. Appreciate input and advice.