The video is a few years old and without sound. It’s still well worth a watch though.
The crossbow gauntlet was created by Patrick Priebe of Laser Gadgets and Geek Native has featured his work before. Priebe is the brains behind this Iron Man gauntlet with lasers powerful enough to burst ballons.
This crossbow gauntlet also has lasers and bursts the balloon but it’s a devilish dart that does the damage.