So I own an account which I want to grow in the music niche. As you know, this niche is very overcrowded and the first spots in search results are very contestet. I have 5+ more accounts in the music niche which are aged and have around 100 subscribers each. Can I use them to boost the rankings of my main account which is relative new and has only 500 subs right now? I was thinking about uploading videos which I upload to the main account a few hours later to the other accounts, with similar name & tags but watermarked and with a link to the main video in the video description. Would that work in any way? Do you have other ideas how I can boost my main channel with the other ones? Thanks!