[Solved]Merge 2 video tracks

I was looking at some tutorials and I thought I saw the presenter move the contents of one entire video track on top of another track that contained video so the clips on the video being moved replaced the video in the track being moved to, but where there were gaps in the edit in the track being moved, the other video remained. Is this possible?

Here's my scenario. For our church, I shoot the sermon with two cams, one a closeup, the other a wide shot. I first lay the wide shot in its entirety into the timeline, then lay the close shot in a track over it and sync them. I then just cut out sections of the close shot for when I want to switch to the wide shot. This works quite nicely. When I export the timeline, I notice that when just the wide shot is being encoded I get about 60~70 fps, but when the close shot is being encoded, the fps reduces to around 40. I assume because both shots are playing in the timeline, but only the close shot is being exported. If I go back to the timeline and remove those portions of the wide shot where the close shots are in the track above (basically A/B editing), the export chugs along at a steady 60~70 fps, but the time to do this doesn't justify the gain in export fps. Is there a way to merge these two tracks into one so I end up with just cuts alternating between the two cams?

I'm using v15b3.

Select the clips you want to move down, hold down shift to constrain the movement to avoid moving them back or forward in time, and drag them onto the destination track, right over top of the clips you want to replace.

It works! Thank you.