Testers are great because they try things you wouldn't think to. You may not go near a wall with faulty collision because you know nothing is there, but your tester might. Tester may accidentally do things out of order. Etc.
Like it's not even your name! You're not the one who's gonna have to explain it to everyone they meet! Geez... it's like they forget that you're not just naming a cute lil baby, you're naming an eventual teenager/adult
This was an ad for a mobile game, so I'm gonna go out on a limb and say it follows modern rulesets. Also you can see clearly he has no monsters and both of his trap/spells are face down. Since DrkMag has no special effects or conditions, hes screwing the rules.
Update... no scam calls all day. I think they learned their lesson. And I'm working on a fake anti-piracy video, featuring a fan game I'm making in MV. If I had the permission to make the game a licensed game that I could sell (rather than having it totally free like fan games are required to be), I'd use a really cool anti-piracy screen...