Supposedly the beef tastes better, I dunno about that.
I buy locally grown, grass-fed beef because:
1) it's local (supports local businesses)
2) it's grass fed (better for the cows, orders of magnitude less chance of them growing dangerous levels of E.coli)
3) it environmentally friendly
4) it doesn't support the big-business meat industry
I'm not going to watch the video, I imagine it is sad, depressing, disturbing and all that. But the write-up around it was informative.
U.S. Food Policy: Humane Society video of workers abusing "downer" cattle: "Beyond the cruelty evident in the video, the Washington Post explains that putting downer cattle into the food supply is dangerous."