I don't see how there can be automatic detection. Just think about it, There would have to be a database with a copy of every single peice of media ever created. Then when you upload the video, the server would have to search through every peice of media ever, Check if any part of the video you uploaded matches any scene from those billions of peices of media, Then if it found something, Check what copyright restrictions are placed on it, Then finally delete it. No, Even if every single computer on the planet were networked, and all cpu's running at 100%, It would not be possible. The check with all that power, Even on one video could take centuries. Until we have rediculously powerful computers, this simply will not be possible.
CPU: AMD X2 6000+ 3.0ghz GFX: NVIDIA BFG Geforce 8800GTS 640MB OC-550mhz core RAM: 2048mb