Basically, 'Herakles' is an omnium-gatherum of film clips depicting images of machismo. Some of those images are explicitly macho: we see various body-builders flexing their biceps and triceps. Other images seen here are not macho in the literal sense, but are indirectly related to testosterone or cojones on some level: we see military aircraft making bombing raids, and footage of car crashes.
If you liked this movie, you should also see: Manly Games (1988)Beach Flags (2014)Maradona's Legs (2019)Music in the Blood (2010)Storytime (1968)