The video starts ridiculing the use of bikes in military campaigns, but around WWI many armies employed them,
https://bsamuseum.wordpress.com/ww1-...d-war-one-wwi/ . Full-size folding bikes were, in particular, pushed and
Montague even developed a military model relatively recently. Well, the Japanese were succeeding using equipment that seemed ridiculous for the time. A parallel story has been that of the British using the so-called
'Funnies' in the invasion of Normandy. These were offered to the US, but the equipment was considered ridiculous and declined. The effect was of a carnage for the US forces but not British. The development of the 'Funnies' stemmed from the WWI British experiences at Gallipoli.