I think plagiarizing is the right word for these. My point of view about this one since a lot of accounts are involved is maybe there is a possibility that neither of the three accounts own that Youtube channel. From what I see these Youtube channel specializes in a lot of things crypto related aside from reviewing cryptocurrencies they also have tutorials on earning crypto in various social media websites. It seems like a lot of users here are just grabbing this videos from this Youtube channel to take it on their own. This can easily be solved if either one of these linked people can provide a screenshot over their Youtube Channel Page where they are clearly logged in, until then the best way to handle this is I think for a DT member to tag all of them until someone provides a screenshot.