able to see what camera is locking in autofocus while shooting video?

[ak82]

Hello

I have an a6000 with the sigma 30/2.8 prime lens. I am shooting video with face detection. I see that the face detection will create a gray box around the subject, but does that mean that the camera is focusing on that, or that it just detects a face? If i have press the shutter the box will turn green, but my worry is that when pressing the shutter down when shooting video it will create camera shake.

So is there a way to see what the camera is autofocusing on and tracking while shooting video?