"A professor... appears to have used a fall semester 2012 political science class to deliver sustained and angered attacks on Republicans, who he characterized as old, white, racist, and 'losers.'"
This video is edited, and I doubt if the edit is intended to do the professor any favors. And to my (lawprof) eye, this professor is trying to get a rise out of the students. He's muttering blunt and provocative statements, then pausing. Ah, but what's a student to do? Engage in classroom debate — the supposedly wonderful opportunity for which they pay exorbitant tuition? Some of them do. They're not entirely inert. The option of making secret video and dumping it online is an alternative to classroom debate, if you come to believe that debating with the professor is a mug's game.
Ironically, this professor is teaching that it's all about power and you need to use hardcore tactics to win, and the student seems to have learned this lesson well. The edited video, dumped on the internet is a hardcore tactic, flipping the power on the old white guy.