I'm not an expert, but as I recall, 1967 Z-28's did not have any engine badges on their fenders.(which would have been near the doors on a '67). The 3 photos in this article that show '67 Z-28's back this up.
Good informational video. However, some of the information is technically incorrect. The 1st gen Camaro arrived as a '67 model. The first Chevy II that used many of the same components was a '68 model. So it would be more correct to say that the Chevy II utilized many Camaro components rather than the other way around. The '62 to '67 Chevy II's were significantly different.