Does Youtube keep the original file?
Once you upload a You Tube video to You Tube, It just keeps that video in that file version... To Update Video Performance You Need to Convert The File On your Computer With a Video Converter Just Search "Video Converter" in Google, A Few Should Pop Up You Tube Just Keeps the Video And File Source You Cannot Edit Its File On You Tube (File Format) Good Luck!
What doesn ''original content'' on YouTube mean?
One of the criteria for being a YouTube partner is original content. Does that mean that EVERYTHING in my video has to be original, and not certain clips taken from reusable(CC) videos done by other channels?