My YouTube channel is for my hang gliding, professional conference presentations, and occasionally other topics of interest. I have not and would not post any gun-related videos there. The Tweater-alternative free speech service
Gab (which pre-dates Parler by several years) recently added
GabTV, a video service, so it my be another alternative to Rumble, but you have to be a paid subscriber to upload.
For simple cut and paste I use Quicktime Player on my mac. For more detailed edits I use the free iMovie app.
Craig