This video is all about gas welding and I go into a bunch of detail on welding tip selection, tacking, gas welding without filler rods, filler rod selection and use of filler rods, gas welding with filler rod, diagnosing gas welding problems with real samples with issues, popping issues and how to prevent them, and even test the samples for strength.  Lots of filtered lens work and dual 4K cameras so you can see what is actually happening during the welding process.