I am currently working of a presentation called Rich Media, Arte povera. The idea is to show that you don't need big budgets to create big impact.
It's even the case for video advertising. Here are 2 examples I really enjoyed.
The fist one is a Lynx video using only one picture (explicit content warning :)) + a packshot
http://www.youtube.com/v/tQNUTzu08Gg
View original media here: http://www.youtube.com/watch?v=tQNUTzu08Gg
The second one wasn't a commercial in the first place but after the big hit of the first epîsode, Coca cola sponsored the second and the third episodes of the trilogy. Here's episode 2
http://www.youtube.com/v/4Mk6qt0ZpLQ
View original media here: http://www.youtube.com/watch?v=4Mk6qt0ZpLQ
If you know other examples like those, I would love to see them.