Isn't this just an audio modulated version of this: http://www.physicscentral.com/explore/action/femtosecond-hol... (it's hard to find a version of this with the original audio intact, it makes a crackling sound just like the video above)

Here's one from 10 years ago: https://www.youtube.com/watch?v=1HHJhpStza0

So not really new tech, just a weird application of it.