I've used moviepy quite a lot and even submitted a PR or two. It's not perfect, and docs aren't super up to date. For many tasks a good nonlinear editor is way

I've used moviepy quite a lot and even submitted a PR or two. It's not perfect, and docs aren't super up to date. For many tasks a good nonlinear editor is way easier. BUT, it also makes some tasks really easy that seem surprisingly complex to do with (the admittedly simple) GUI tools I've tried. E.g. making a 3x3 montage of videos playing simultaneously, with a caption beneath each.