Originally Posted by codeman99998
On Youtube you can find videos made by Rorion Gracie, Damian Maia, and Stephan Kesting easily. You can also find instructionals by a plethora of other legitimate Brazilian Jiu-Jitsu black belts. The submissions 101 guy has no black belt. As far as I am aware, he is a white belt in BJJ with a black belt in JJJ and a purple shirt (that many say he bought) from 10th planet. There are MUCH better easy to find instructionals out there than submissions 101.
There are many guys that add videos on that channel. It is very good in my opinion.
He is not wearing a Gi either so a basic understanding of all positions is a great starting point.