>>3738921I had a zhiyun smooth 4 which was really good. Way oversized for a smartphone though. And Davinci resolve can stabilise some clips easily, to a degree though.
For AF tracking it’s the Sony A7siii, A7rIV, A7c, A6600 and I think the A6400 (no ibis though, but on a gimbal it wouldn’t be needed). The rest of the Sony cameras have older AF. There’s not really anything else that has AF this good, so if you’re in any situation where a subject has to be followed with movement and a relatively thin DoF you need to weigh up how much you’re willing to spend and what you can compromise on
There’s also the Sigma Fp which is tiny and FF, L mount though and I have no idea about AF. I’d check YouTube reviews since it’s about video you want to see them head to head and see if the other cameras will AF well for your situations or if the 4K from the A6xxx looks good to you, how rolling shutter compares to other cameras in the same price point.
I just looked at the most aircross 2 on YouTube, costs more than the 1 but it has some really nifty features, another person can watch on a smartphone and move the phone around and the camera will follow the phones movement