Original footage looks like this. Not a big leap to get the final product. Converted to B&W, some levels adjustments, and combing my archives for the appropriate human silhouette to trace in Photoshop.
Silhouette from 2015 shoot.
Human silhouette added in FCPX
Grabbed a silhouette from my archives. A 2015 shoot. Traced the outline of the figure and filled in Photoshop, saved as PNG for the transparent background.
Added as layer, sized and positioned in FCPX. Added a Color Correction effect with a feathered mask to match the browner, lighter tones of the footage. Put those layers into a compound clip adjusted levels and colors.
Nikon D800 body on a tripod
70mm-200mm Nikkor VR (first version) lens with variable ND filter
50 sec, f2.8 ISO 100 24FPS Exposure
And of course 15LBS of extra gear, brought, not used because of compulsive contingency packing habit
MacBook Pro Retina