Not sure what to make of this

The following video was brought to my attention earlier tonight.



[Embedded video]

Definitely a different approach to fishing than I am used to and I really don't know what to make of it (partly because I don't really know what is going on). In one sense it is kind of cool to see so many people come together and engage in a similar activity while, on the other hand, it is kind of crazy to see a lake basically drained of life in just minutes.