http://www.vzaar.com/ Vzaar is completely focused around eBay, even requiring users to login to the site using their eBay credentials.

Buying and selling with videos: a great experience for buyers and good way for sellers to make money. That was the idea, but within a millisecond we realised that there’s already one place where millions of people sell online: eBay. So, rather than build a whole new ‘video bazaar’ from scratch we thought: “why don’t we help eBay sellers sell more and make more by helping them put videos in their listings?”