123RF and Dreamstime, I make about $100 a year on video. Each. That's motion graphics though, I find motion graphics do a lot better than standard 'video'. VideoHive...I make several times that a month, but if you upload there (even though you might make a lot of money), you will be contributing to the downfall of stock marketplaces, you will lose all self respect and become a shadow of your former self, you will be shunned from society for your sinful ways, and it's quite possible you will bring about the end of the world as we know it. Something to keep in mind.
VB is VideoBlocks.