Nikon D5500 - Manual (Page 211)

187 Recording and Viewing Movies
4
Save the copy.
Highlight Yes and press
J to create a
fine-quality ( 0 90) JPEG copy of the
selected frame.
A Save Selected Frame
JPEG movie stills created with the Save selected frame option can not
be retouched. JPEG movie stills lack some categories of photo
information (
0 192).