Switching between video feeds

I'm really, really new at this. A friend and I used two cameras to record a musical event from two angles. I'm making a movie out of it, and I want to use his audio for the most part because he had better equipment.  But at times I had a better angle visually, so I want to be able to switch back and forth from one video track to the other. And there are a few places where I'll want to use my audio, so I don't want to delete it entirely.

So: I have both feeds loaded in synch in my timeline -- his is video and audio 1,  mine is video and audio 2, and audio2 is muted with the controls at the left. Video2 shows in the editor by default unless I hide it.

I have two issues.

1.) Is there a way I can run both videos side by side in the editor, so that at any given moment I can see which video track looks better?

2.) The only way I can think of to switch from one video to the other is to make a combined cut across all the tracks at every point where I want to switch, and then for the segments where I want to use video1, I have to delete (not just hide) video2. For the segments where I want to use audio2, I have to delete audio1. Surely there's a better way? If I subsequently decide I want to move one of the cut points, how can I restore the deleted part of video 2?