I know this, I, purposefully have tried on many occasions to create a vrs condition and after one year and many many tries have not been able to! Full throttle down from 400 feet straight down, no right stick movement at all, %100 left stick down.
lf those attempts were in still air or ATTI mode then it's good to know that the P3 is that resistant to VRS. I know that the P4 doesn't exhibit it in GPS mode, but several people have commented that it will descend faster in Sport mode. I haven't tried that, but it is plausible.
On the camera shake issue it appears to show some instability as it starts to descend. I've seen VRS descents with equally steady camera views. Do you have a more likely hypothesis for this case?