I do some video recording, with separate audio and then I use a video editor to multiplex the video/audio. And then of course, some nice titles, video fade in/out, brightness adjustment, etc.

Over the past 3 years, I've gone through Cinelerra, OpenShot, Kdenlive, and some I can't even remember. Very frustrated over the state of video editing on Linux, I unfortunately once had to use the editor on Windows. :(

But now, I'm using Kdenlive each time, and I'm very happy with it. There are some tutorials out there on YouTube which help too.