The ornamental design for a protectivecase for camera on container spreader, as shown and described.
FIG. 1 is a top, front, and right side perspective view of a protective case for camera on container spreader, according to the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines depict portions of the protective case for camera on container spreader in which the design is embodied that form no part of the claimed design.