Why would someone love ants so much?
That is a really great vid. This guy probably enjoys playing God with his little ant friends, but he hasn't punished any of them so far, it seems. He probably enjoys their simple, predictable nature.
However, here is another video he made, which really reminds me of the one you posted:
Maybe he wants to crush all of us, like the hands in this vid do to the ants.
nana825763 is a female of esoteric interests. She produces material quite unlike anyone else's. I think in that video, killing the bugs while dystopian sounds play in the background of contorted sexual imagery is meant to portray the relationship of sex and filth. Just a guess, truly it can mean anything. Or nothing.
She also has a habit of removing her videos. I showed Ana (mentioning her so no one thinks I'm making this up) a video of her drawing a maze over a giant canvass the day it was posted. It was time-lapsed at quite a high speed, and had to in the end have thousands of possible routes, maybe well over 10,000. It must have taken months to make. I'd never seen anything like that. The next day, I was going to post it on here, but she took the video down.