... nice video!
But, as I said - you'll need many seconds or even up to some ten seconds heating the same(!) spot, to get through the hull and damage enough of the guts, to kill it ... and this weren't "hardened" drones, like with brighter/reflecting hulls or better dodging capabilities.
Or, enough power, to punch the beam instantly through
By the way, here some of the demonstration videos from my mosquito-project, where I've assembled and programmed the tracking+shooting system, to shoot down the pests with tiny droplets of pestizide (instead using lasers)
Detecting/targeting:
https://www.youtube.com/watch?v=lspb1UlnO3w
Shooting range:
https://www.youtube.com/watch?v=o0ZKSvCb39k
Viktor