First comment on Youtube:
"It all began with the forging of the Great Kilograms. Three were given to the French; immortal, wisest and fairest of all beings. Seven, to the Germans, great miners and craftsmen of the mountain halls. And two, Kilograms were gifted to the United States, who above all else desire power."

I think they tried to teach us the metric system in fifth grade. Don't recall them trying all that hard. Pretty useless as i don't recall anything being metric in the 70's in America. The only thing i ever recall (sometimes) was engine sizes.

In Canada, we like to mix up both systems. We get our weather temperatures in Celcius , but we prefer our pool temperatures in Fahrenheit. Construction plans are laid out in millimeters, but materials are sold in inches (thank you USA). So, we have to be bilingual in units as well, eh.

Recently I was surprised to see a ruler that had centimetres on both edges.

I have no fucking idea what imperial weights are but more often than not I'll give my height in feet.

Veritasium - World's Heaviest Weight has been added as a related post - related requested by eric3579 on that post.