Stringr crowdsources video and photo content and sells it to newspapers and media outlets.

From their website:

Simply put, Stringr is a marketplace that brings buyers and sellers together. We focus on video footage for TV news programs.
Stringr is a site where you upload and tag your videos. If the station wants your footage – it’s simple-they’ll buy it from you. No need to call stations to try to sell it -which takes away from shooting!
Stringr also brings work to you. If you set-up push notifications, Stringr will let you know when the media outlets want something shot. If they use your video, you’ll get paid within 24 hours.