The Civil war: 1860s will have no bearing on any Civil unrest that might occur today.
As far as the video, he lost me on Northerners patting themselves on the back? Honestly I think most Northerners who aren't black don't give a shit about the Civil war. Unless your a military/history buff or had family who actually fought, most people up here have bigger things to worry about than something that happened 150 years ago when their families were sitting in Europe,Asia or the ME.
As far as possible civil unrest today. The issues are different so the lines will be completely different. well...that is if you can get our fat asses off the couch to do something about what we don't like. Sometimes I think if China wanted to invade all they'd have to do is promise Americans a large screen TV, two lazyboys,20 years of free junkfood and unlimited porn and they could just walk right in. The Mexicans give us food,drugs and lawn care and they walk in no problem. Civil war, not likely.