There are a zillion clips about a gimbal on Youtube alone. It is a device that allows you to shoot steady footage. So check it out on Youtube if you want to know more about the topic.
I bought one for my GoPro. A Chinese manufactured FY-G4S. For my budget is was rather expensive. I made it up by selling my unused Nikon D300 and a SkyWatcher telescope.
I had some ideas about what a gimbal could do with video footage. You know, the stabilising the walking and so on.
To be honest I was flabbergasted by what a gimbal really can do. Once again there are a ton of reviews to be found on Youtube. But it surpassed my expectations.
My examples are raw. No slow motion or whatever other effect. The footage I am sharing is out of the box except for some basic color correction. No post work on shake or anything else.
Just the gimbal working.