In Kajabi and other course platforms you can upload a thumbnail. This thumbnail then also is the thumbnail for the video.
In GoHighLevel, right now the thumbnail only appears in the navigation, but not the video itself.
I've had several clients complain about this & request this and I assume it would be pretty easy to set up.
Then people can choose what thumbnail appears in the video.
It'll look a bit cleaner and more premium and give people more choice.