The Burgess and Green article covers a quote by the co-founder of Flickr, comparing picture sharing to keep in touch with family and friends very similar to the qualities of YouTube. One step above that I believe is the newly popular app "vine." This app allows users to create and post short video clips that are 6 seconds long and can be shared with your friends or posted on social networking. This type of user-generated only app will definitely not replace YouTube any time soon, but it does have a direct purpose of sharing short videos with your friends (or at least your online friends).
But just like complaints with YouTube, it may begin to be taken over by the media or celebrities. Mashable wrote two interesting articles on how artists are using vine to push their product and political attack ads on vine. (Product Pushing and Attack Ads)
Although Burgess and Green argue that YouTube needs to take their users seriously in their claims to have more user-led innovation, it is obvious that any popular medium will attract advertisers, mass media, and celebrities. They don't want their limelight to be take over by some little boy who gets his finger bit. I enjoy the user made content, but I don't mind watching clips of the Ellen DeGeneres show on YouTube or even the Superbowl commercials. I think the perk of YouTube is you can find almost everything on it. You don't need to go to a new website for a specific movie. I say: