I’m a real fan of Canon’s latest generations of Autofocus, they call it DPAF (Dual-Pixel AF). Some sort of phase difference detection using pixels that are used only for AF not for recording? I don’t know.
That in combination with face detection and touch-screen focus targeting is just plain awesome. I speak from decades of experience when working pros considered AF a toy. It’s really come of age.
I’ve not kept up with exactly which dSLRs and camcorders have the latest version (of course they keep on improving it), but the 80D for stills/video and the C100 Mk II as a cinematography camcorder that does dual duty into videography. The both have the latest Canon DPAF goodness.
But, action video can be a bit of a crapshoot, when things move fast cameras *and* camcorders can get confused. Um, so can I
Just to comment on that--Canon's touchscreen focusing is a miracle I would not be able to operate without, unless I had an assistant focus-puller.