Why MovieMaker btw? I thought it had died years ago? I do remember it being a real pain to work with when I last tried using it to help the kid with a school thing a couple of years ago. (She landed up doing a better, quicker job of it herself using the free version of iMovie that came on her iPad!)
I think the new version of Paint (of all things!) has some basic video edit tools, with more supposedly coming in the next Windows update. Also, although I haven’t used it myself, check out this PCMag review of open-source program called Shotcut maybe:
https://www.pcmag.com/review/356016/shotcut. What are you using to record your footage in the first place?