Video recording problems

While I have recorded the last two sessions of our Zoom meetings, I am having difficulty editing them. They have been broken into two or three segments each time, and I have been trying to use the iMovie application on my Mac to patch them together. I've never used the app before, and I'm having trouble figuring it out! (Much to my surprise.) So nothing is available for anyone to download. 
The time I have for writing is limited by many things, and I cannot afford, right now, to take time away from writing to work on the recordings. I'm not sure when, if ever, that is going to happen. My apologies...Since my hard drive got wiped I have not been able to recreate the environment and procedures that were getting the recordings done previously.