Just because a picture shows up in an internet search for 'mark spitz speedos' doesn't mean it's Mark Spitz - in just the first four rows of pictures I saw one of Greg Louganis and one of Michael Phelps......
Gary Hall is the guy in a white USA tee-shirt - don't see a black 'tache' on him, though the video is rather poor....
About 'brief' suits reappearing - they never really left. Nearly every collegiate swimmer in the US practices daily in a brief Speedo (or other brand suit). During the regular season, most also compete in brief suits, saving the jammers for the big end-of-season meets where they strive for best times to try and qualify for the NCAA championships. I can't even count the number of college meets I have attended over the past 20 years as both a fan and a stroke/turn judge - and the brief suits are always the dominant suit until the final one or two meets.
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