I guess riding that trail will definitely teach you bike handling skills. To be honest, I would be more worried about the rock cliff on the left than the drop off to the right as banging the rock cliff on the left will make going off the edge to the right a possibility.
I don't use Strava. Don't need an application to tell me I am slow because I already know.
Someone post a link to some Porcupine Rim footy - that's a LOT scarier than the OP's vid (not that it wasn't intimidating enough).
You must be stoned. I've ridden Porcupine Rim and there is nothing remotely like what these guys are riding. Yeah, there are a few sections where you get close to the cliff's edge, but there is nothing there that compares to what these guys are doing.