Video editing. I downloaded Filmora, but I cannot see how to select, cut, and paste?

Really those 3 functions are all I need. Do you know another video editor that's easier/clearer? I have cyberlink powerdirector, but when I cut and paste video, it doesn't cut the sound at the same time, so it messes up the audio.
Answers

Iridflare

I recently installed Davinci Resolve so that I could play with the 4K video from my new camera - it's easy to use, and it's free! Audio and video are normally grouped by default, so if you're having problems with PowerDirector it might be a programme setting that's been changed.

Anonymous: https

https://www.youtube.com/watch?v=x60eT4FJpe0