Try this simple script. Similar to your referenced video it uses paths, Some time in your project these need stroking on a layer to produce a graphic.
However a couple of very short demos. Since this is script-fu no automatic merging of paths, you need to right-click and merge visible. (shift-click on an 'eye-bal' to toggle all visibility)l
Edit: just seen your Edit - now using Gimp 2.10 - no problem, the following is in Gimp 2.8 but exactly the same in Gimp 2.10
https://i.imgur.com/vFqf0ZL.mp4 and https://i.imgur.com/XzGHvY8.mp4 (Even if you can see these too well, the script dialogue is self-evident.)
Unzip the attachment. PathRotator2.scm
MacOS and scripts ? I think these go in /Users/MyName/Library/Application Support/Gimp/2.10/scripts
You might have to make the scripts folder yourself.
edit: attachment modified for 400 maximum
However a couple of very short demos. Since this is script-fu no automatic merging of paths, you need to right-click and merge visible. (shift-click on an 'eye-bal' to toggle all visibility)l
Edit: just seen your Edit - now using Gimp 2.10 - no problem, the following is in Gimp 2.8 but exactly the same in Gimp 2.10
https://i.imgur.com/vFqf0ZL.mp4 and https://i.imgur.com/XzGHvY8.mp4 (Even if you can see these too well, the script dialogue is self-evident.)
Unzip the attachment. PathRotator2.scm
MacOS and scripts ? I think these go in /Users/MyName/Library/Application Support/Gimp/2.10/scripts
You might have to make the scripts folder yourself.
edit: attachment modified for 400 maximum