Gordon Laing has a collection of sample footage from some of the newest cameras such as the A6300. Here is his recent footage from a Sony A7r Mark II camera taken at 4K UHD APSC / 30p / 100Mbit / 25600 ISO / PP off.
Sample movie filmed with the Sony Alpha A7r Mark II in its 4k UHD APSC / 30p mode at 25600 ISO with Picture Profiles off and 100 Mbit compression. I used the FE 24-70mm G-Master at 24mm f2.8. This video is part of my A6300 review at Camera Labs. You can find my review at:
Feel free to download the original file for evaluation on your own computer, but please don't upload it to another website without permission from https://www.cameralabs.com/ Thanks!