Nikon D5 - Manual (Page 88)

66
y
D
The Count-Down Display
A count down will be displayed 30 s before live view ends automatically
(
0 56). Depending on shooting conditions, the timer may appear
immediately when movie recording begins. Note that regardless of the
amount of recording time available, live view will still end automatically
when the timer expires. Wait for the internal circuits to cool before
resuming movie recording.
A
Adjusting Settings During Movie Recording
Headphone volume can not be adjusted during recording. If an option
other than
I (microphone off ) is currently selected, microphone
sensitivity can be changed to any setting other than I while recording
is in progress.