I largely disagree, but for a fairly nuanced reason. The work that it takes to get an FFL is mostly knowing what is and isn't legal, with a bit of proving that you have proper safety facilities to store what you keep on hand (proper powder magazine if you do large batch reloading, etc.) You can get one without knowing the first thing about actual physical modifications to guns. You can get one solely to carry inventory and sell it, with no services provided. Having resources for that person is incredibly useful! It's not like we're going to ban books on guns, or the blueprints that are part of 100+ year old public record. The prints for the Colt Model 1911A1 are up on the library of congress because it was designed for the military circa WWI. I'd prefer proper safety disclaimers on videos, or in books, or wherever. Preferably with a reasonably complete guide to shop safety and precautionary measures on that sort of thing, but I don't want it all banned per se.