Hadn't heard of the site before, but it seems to cater to a completely different market than the stock sites. They don't sell the typical B-roll footage and very few of the clips there would be accepted at any stock site anyway.
But I suppose a lot of "news sites" (kind word for them...) are looking for this type of content and I wouldn't be surprised if you could sell a video of your dog pooping on your cat.
Would love to hear about any sales success there so I can leave my real gear at home and take my cellphone out and try to find celebrities.