(The video describes the actual lithographic laser.)

And it's a source of serious hazardous waste products. It's a tin-ion laser, operating in an ultra-pure vacuum, on an unbelievably high-energy band (even laser "lines" have definable bandwidths). There's really not a lot of wiggle room in materials selection for the laser.

I wouldn't call it a laser. Lasers are just a forming and heating mechanism. The actual light source is tin plasma.