Nikon D780 DSLR Camera (Body Only) - Manual (Page 319)

273 Options for Movie Recording and Editing
3
Select [Choose start/end
point].
Press the i button, then highlight
[ Choose start/end point ] and press
2 .
4
Choose the start point.
To create a copy that begins from the
current frame, highlight [
Start point ]
and press J . The frames before the
current frame will be removed when
you save the copy in Step 10.