Nikon D810 - Manual (Page 77)

53
8
Exit movie live view.
Press the a button to exit movie live
view.
D
The Count-Down Display
A count down will be displayed 30 s before movie recording ends
automatically (0 462). 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.