Greetings Rosy,
I have had the experience of Facebook and YouTube flagging some of my shows due to copyright problems. The music was from a non-copyright source but someone had claimed it to make money off of it. Hard to fight. Even in the Ireland set of shows, all music is from non-copyright sources. However, several still have been flagged but allowed to be used. Kinda crazy. Some shows have been flagged so they has been restricted from playing certain countries or portions muted. I try to only use non-copyright music but they still get the attention of Facebook or Youtube. As I said, music is the most difficult part of making a show posting on Facebook or YouTube.
And many times, the name of the song that they claim is copyright protected is not the name of the song I used.
No, I don't use a gimbal. I have a GoPro 11. It really is amazing at keeping the shot steady. It has 'Hypersmooth' for stabilization. The 'Horizon Lock' provides the camera with the ability to keep the horizon level even when the camera rotates 360 degrees. Yea, some of the shows are a bit long. But they are made mainly for when I want to re-live the experience, even years later.
Gary
Added later: All GoPro11 video was hand-held. No selfie stick, just me holding the GoPro11.