Macs and video have long been up a tree, K-I-S-S-I-N-G. Professionals were editing in Avid back in the late 1980s, and iMovie debuted in 1999 alongside the FireWire-enabled iMac DV.Today’s Macs are much more powerful than their ancestors, and that means even free apps are capable of doing some amazing things with video. It’s surprising how much you...