First off, it's the manufacturer's job to "enlighten us", not mine. The video was his. He went to great lengths to show us the powder lol, but did nothing to show the bullet. The condition of the bullet is the critical thing, otherwise we could use vice grips and a Contadina tomato paste can lol.
In the second video, he shows reasonable closeups of the original cartridge. Yet the pulled bullets are shown, one side, from a greater distance. Its not possible to see if there are any marks on the bullets.
So . . . the "Wonder why?" was not an accusation, as it has at least two possible answers. Either the bullet is marked or damaged, or he doesn't realize that's the key thing to show. Without an answer to that, I'm not a buyer.
If you say the bullet is undamaged, post a video focusing on (the lack of) bullet damage. You'll get (him) customers. Otherwise these videos create hope, but do not shut down skepticism.