Nikon 1 aw1 Reference Manual page 99

End recording.
6
Press the movie-record button again
to end recording. Recording will end
automatically when the maximum
length is reached, the memory card is
full, the lens is removed, or the camera
becomes hot (0 xxii).
A
Maximum Length
Up to 3 seconds of footage can be recorded; note that depending
on memory card write speed, shooting may end before this length
is reached (0 206).
Movie-record button
y
74