I recommend you try sharex https://getsharex.com/downloads

but with these keybinds

In particular ctrl+printscreen for a fullscreen immediate screenshot shift+printscreen is a region screenshot but it takes a video of your region instead of a picture I use that all the time

example https://youtu.be/-QzkPyEsslE

You can then cut that with losslesscut really really easily

https://github.com/mifi/lossless-cut

If your video is too big to share (25mb) then you can recompress it with handbrake https://handbrake.fr/