Garry's Mod teaser video?

I was looking at the Garry’s Mod steam page, and I noticed there was no teaser video. Most of the games of steam have a teaser video, or just a gameplay video. Would adding an teaser video a dumb idea, or can this be implemented to the store page?

Next contest?

There are so many things you can do on Gmod that the trailer would be fucking long.

That and it’d be full of 6 year old kids destroying the crap out of every server, then nobody would buy Gmod, and that would be bad.