I couldn’t sit through the video, but I skipped through enough to see he’s using a Silver Nitrate system. I’ve used that exact set up from Angel Gilding.
As far as chrome goes, nothing beats it but vac metallization. BUT.. it requires a lot of practice and finagling to get right. It also requires a significant set up since you have to base and clear with 2K clear coat. You’ll need an HVLP gun and an adequate compressor, proper ventilation and PPE. The learning curve is steep, be prepared to make mistakes.
For my money, chrome paints like Spaz Stix and Alumaluster are just fine.