Vidrate is a software for allowing multiple people to vote which video files of a database should be kept.
Do you have a file server with lots of videos that you share with multiple people? Then this tool is for you!
It basically is a way to keep the videos in a database and let everyone vote which videos they want to drop. Also it lets you select which videos you have seen for your own reference (I discovered that I haven't seen about 50% of the videos we have on our file server).
You can set it up so that videos are automatically scanned by a cron job and so that videos are automatically deleted when every user decided to drop it by a cron job.
This way you don't have to go around asking if anyone wants to keep a specific video for every video you want to delete. This allows you to quickly free some space on your file server without deleting any videos that someone might want to keep.
You can also enter a comment for every video, including a few standard ones like "Bad quality" so you have a reference why you want to delete it. Later versions will probably support marking videos for redownload in a better quality as well as showing the comments of other users.