We are  not trying to draw a conclusion that all these Altcoins this Influencers do promote are all scan. It is very good to watch their video cause sometimes they tend to share useful informations when promoting projects. so it is left for you to decide try as much to pick the odd ones from the even, forget the hypes they will attach to the project, do your own research as no one else will bear the outcome of your loss.
Take your time to understand the project they are talking about, some of those projects they promote can give profit but first have knowledge before investing your money into it.