Though not as big as Pond5 at the moment. I'd recommend giving http://www.motionelements.com/ a try. The footage library has increased over the years and serves as a good alternative to the popular footage libraries out there. All the content is royalty free so its convenient to use.
Lastly, there's an extensive library of free stock video, so I guess that's worth checking out as well. You can find it here:
http://www.motionelements.com/free/stock-footage
