Post Production Techniques (Video)

For the scene above I started of with footage of a interview with John but I wanted to cut out something he said but keep the rest instead if coming back to it later I overlaid a cutaway of him in the garden to cover up the edit. 

I have a few different shots of John in the garage. I went with a shot of him going into the garage but I preferred the audio and what he was saying in a different shot in the garage so I put the one I liked visually and then put the audio footage I like underneath.