Hi all, I wonder if you can help me. I'm fairly new to video editing where I've used it in the past mostly for acquiring and processing scientific imaging. I've recently migrated onto Linux and am enjoying getting to know Kdenlive, and what I'm trying to do is probably very simple but is actually proving hard to work out how to do quickly and simply (probably because I'm not looking in the right place).
I have two infra-red cameras looking at a bat roost at emergence time, one is a wide shot and one is a tight shot. There is about 30 minutes footage from both. I have dropped the wide shot onto Video track 2, and the tight shot onto track 1. As both cameras have bat detectors wired into the audio sockets, it is easy to align the two tracks using 'set audio reference' and 'align audio to reference'.
What I want to do is to repeatedly cut between the wide and tight shot - there are about 150 bats coming out, and for each one I want to get the tight shot of it emerging, then cut to the wide shot of it flying off, then back to the tight shot and so on.
I've set the project monitor to multi-track view, and I can obviously use the razor tool to cut sections of the top video track such that the bottom one shows through but once the cut is made, it seems rather final if it's not quite in the right place. Is there some kind of movable mask such that the top track can be rendered invisible and which can also be moved around to the right point?
Sorry if these questions seem rather basic, it's an amazing piece of software but I'm really just getting started with it.

Once you've made a cut and deleted part of a clip, you can drag the edge of the remaining part(s) of the clip to make them longer or shorter - which allows you to add back what you just cut, and get the position of the cut just right quite quickly. If you zoom all the way in on the timeline, you see a frame-by-frame view of the video, which might also make it quicker to find the appropriate places to cut.