You can upload to Revo, Pond5 and ClipCanvas and park the clips in the tagging cue forever. Shutterstock has an difficult backend and it's qets very messy to do it there. They also delete the thumbnail after a relatively short period.

Fotolia and ClipDealer also allow you to upload and park files forever, apparently. Be aware that these sites are relatively low performers for standard video clips. If you have exceptional content you may have another experience at the minor sites.

You can get all the links to the sites, reviews and the sites ranked on income production on my blog at www.stockvideoseller.com