That's good. I really think you need to build it up a bit before launching, though. As someone who works in media, nobody likes the job of entering all the credits into IMDB, but someone has to do it because it's a good marketing tool. Right now this looks like an idea more than a product, but there is definitely a need.
Thanks for your comment. This not like IMDB where everything has to be reviewed first. Here, Video owner (channel owner) is responsible for giving credit to other youtubers for his/her video. Here is a sample: http://www.rshiv.org/title.php?v=oFMsqrG9RWg