I was also going to add that you could have visual variety by first laying down the good audio track with its corresponding video and then using the video from the other tape (let's call it the B Roll) and if it is shot from nearer or farther away, a higher or lower angle to give visual variety but as you say you are only starting out in video maybe we'll leave it for another day.

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Better than a poke in the eye with a pointy stick any day...