[espadrine]

> I've tried most video (and audio) editing tools

I would love you to expand on that if you can.

I am currently settled on kdenlive, which is reasonably stable and features non-linear editing with a number of standard effects (I consider things like fading, zooming, speeding, blue screen to be pretty standard), although it has some rough edges, especially around sound editing (which forces me to use Audacity on the side).

I notably use it on a Mac as well; it is clearly superior to iMovie, although it is clearly inferior to Premiere and Final Cut.

However, I haven't tested the competition for a while…