A few years back there was a popular video of a human powered ferris wheel in India. I use that clip to talk about labor abundance in the Heckscher–Ohlin model of trade since India is so labor-abundant. Earlier we came across this fantastic video of a construction site in Thailand (another labor rich country). For small construction jobs, the workers will use manpower (literally) instead of machines to drive piles into the ground.  This clip could also be used in a labor economics setting if you’re talking about substitutes in production. Either way, this is a fun-video for class with a pretty nice beat from the tambourine-wielding foreman.