So this is a really niche move, it only works if you were armbaring from top and if they use the RNC grip to defend it. But having said that if that is the situation you are in it is a very low energy way to try to finish them through the defense. It also 'sneaks' up on them.
Let me be clear on 3 things. 1.) I'm not in the video but I did show the technique to my instructor who is the Black Belt demonstraighting it. 2.) as far as we know I invented it tho I know that grappling has been around for a long time so it is unlikely there is anything left to be invented lets just say I did it without anyone showing me to 3.) it's had a few names in it's time as you can tell by the different intro name vs video title name. I've since shortened the name to Robacana.
Oh there is a 4th thing, feel free to follow the overall channel it has MANY great techniques and Professor went to school to be a physical education specialist so he gives fine details and we have a AV guy who runs his own business so the production quality is very good on top of that.