YodaYeo‘s 120p/150 degree AF Improvement shutter hack for 4k 25p/30p footage seems to work quite well from what I have seen online and some people are addicted to testing the solution. Max Yuryev did a very thorough test of the hack and it doesn’t work all of the time, but at least it offers an improvement sometimes, which is something cinematographers/videographers can work with.
Panasonic GH5: B&H photo / Amazon / Adorama
Panasonic GH5S: B&H Photo / Amazon / Adorama