Video Filming Production and After-Production?

Well, Im a bit confused on how the process is of filming since I've never took any real cles just studied and edited video. The Different cuts, do they have 2 different cameras all shoot at the same time, or different times?And how can I make up for two cameras at a time with one camera? Do I shoot it twice, but it might be an akward cut espicially with the audio? How do I fix this? And flying camera effect that I've seen in movies, is that with a suspended steel cable connecting with the camera, and how do I do that with a normal tripod without it shaking? Is there a makeshift method? Thanks in advance, If there is any more advice or tips you can spare it'd be glady appreciated