Yes... That't really cool...
Have you ever heard me refer to super capacitors in past posts? They work great when you need a battery but have very limited space... check this guy out... I think he's the same guy in your video too... but here he disconnects his car battery and uses super caps to start his car and run it for a few days... https://www.youtube.com/watch?v=z3x_kYq3mHM that guy does have some crazy electrical talent for sure... Thanks for sharing