For what it's worth, the YouTube's movie, overlapped onto it's LD test capture video, shows an over-shoot similar to the other fullscreen-widescreen compare:
BTW, sometimes, when shooting fullscreen to be soft-matted for widescreen, the area around the widescreen safe-area is not "clean" of things like microphone, or no front-cockpit-of-the-plane, or some such. That might require a fullscreen release to take the extra step of cropping. The US laserdisc was "officially released" as fullscreen (beats me why) and all those public domain DVDs probably used it as their source (beats me why, too).