I am really curious to see what Facebook has that duplicates YouTube's very resource intensive ContentID platform for claiming copyrighted material and redirecting ad revenue to the claim owner. I also wonder how Google is going to handle the uploading of YouTube content onto Facebook now that there will be serious money involved. Relevant story about the phenomenon (I work for Fullscreen so this is my CEO talking): http://variety.com/2015/digital/news/facebook-video-piracy-f...
On a personal note I find Facebook's video API to be better (docs, reliability) than YouTube's.