ball, triangle or square rotating…..
I think the principle will be the same (maybe Cranston and/or Tony will chime in with more detail)
If I am not mistaken, PD does not support alpha channel .avi video with transparent background,
so building with mask I think is the way to go.
Other options can be found in other, more expensive programs – where you will also
have more options with light and flares.
( At this time, I think senior contributor Cranston is the most likely to tweak something
similar to your example out of PD.)
Just something.
https://www.petitpoisvideo.com