yt-dlp and Jdownloader2 work most times

Don’t listen to fearmongers and keep on doing what you doing.

kdenlive is not easy and not fast.

I would try different ones and pick the best that suits you needs like shotcut or pitivi

Is this different than robocraft 2015 project?

editing videos

What program will you use?

I have heard that DaVinci resolve is very hard to set up. as for Kdenlive, I have used it few times, and it felt very clunky.

I would go with mint if you have older hardware and bazzite if you have new hardware (especially nvidia graphics card). If you really want windows-like layout check zorin OS.

for actuall advice: I would try a bunch of them and stick with one where video editing works.