truth be relative to ones level of understanding

Haha happen in chemistry too. At individual year levels. Learning it in form 5 and going on to form 6 be like 'what i learnt was a lie!'... And then after that if we go further into uni also the same thing 'what we learnt before was a lie!' 

Well to be fair, many things we know as truth today will be outdated in the future and might not be 'false' just... shallower as we get to go deeper. 

Think of galileo telling the church the earth wasn't the center of the start system but the sun.

I'm not saying truth is relative. But the exposure to things that can be relevant to an individual at a certain time is. You wouldn't teach a baby economics before math. Uh.. Maybe not even math, just learning to read.

Your students might not understand this video even if they watched it. But to those that do, good for them.