A model release form gives the right to use a photo for most purposes* including things like marketing literature, e.g. the classic happy smiling diverse workers found on company websites and in promotional brochures. However, if I just take a photo of you in a public place I can upload it to Flickr, post it on my website/blog, sell it to The New York Times for editorial use, etc. You have fairly limited rights to photos of yourself taken in public.

A video is just a sequence of still frames so I don't know why that would be any different.

IANAL. Added: I'm primarily familiar with the US. Your mileage may vary elsewhere.

*subject possibly to what I wrote earlier about misleading or defamatory purposes, e.g. if I use a photo of you to illustrate an article about neo-nazis.