For what its worth, it is some how related to a Taiwanese maker of full scale laser markers.. That presentation video, with the speeded up laser marking, must have cost between 25,000 and 40,000 USD to make.. I'd like to be a fly on the wall at the CDRH offices in Maryland when the consultant shows up to try to push the approval thru.. No keyswitch, no warning stickers, emission indicator is non-compliant, etc...
Really the US rules could permit it, provided it is operated in an enclosure to keep the emissions Class I. However the limit switches on such an enclosure have always been required to be hardwired.
As for free air laser engraving, this is not anywhere near Class I or IIIA accessible energy limits, , so NO way... Again, unless some high Dollar Laser Safety Consultant, (I know three of them) finds a loophole I'm not aware of.
Interestingly enough, they may, in some cases, be required to have a US National do the paperwork and accept responsibility, once a notification of potential liability occurs from the Government.
Steve