Hi, Could it be a problem to upload new videos which are about the same subject as the old ones? An example: i have created tutorials in 720P without subtitles. I want them to be replaced with 1080P videos with subtitles. So the length will be a bit longer and it's a new recording. Can i let the old videos stay on my channel and refer to the new video in the old one? Could there be any YouTube policy problems due to similar /duplicated videos?