Yes. My point is that it should come as a surprise to no one that fully-automatic weapons, designed to take fully-automatic trigger groups, sears, and disconnects, are easily converted to full auto. That also goes for burst-fire weapons and other "machine guns."
Yes, you can file down the sears on most other weapons, if you don't mind them instantly mag-dumping like that guy's Glock. And don't care about jamming or open breach detonations.
You're going to be hard pressed to find a gun that's easily converted to a safe, practical auto, simply because the ATF works it's darndest to ensure that those guns don't exist.