I think these videos are rather boring than interesting for teenagers unless they're animated or funny.. Teens are watching fun videos, not educational ones most of the time. For example, BuzzFeed always does great videos because they are interesting, educational, fun and animated. This raises up the curiosity for teenagers.
Kids loves playing games and there are many bitcoins related games available nowadays so in that case they will also have fun of playing and at the same time they can also earn some money so I think this can be the best way to motivate or educate kids about the bitcoins.
Great idea but spending too much time in the front of a computer (like we do) lessen the kids/teenagers physical activity.
it would be best to not teach or explain to them what bitcoin is or how does it work but let them know that there is a bitcoin
and let them grow with an environment involving bitcoin.
easier for them to learn bitcoin as they grow up as they are already familiar with the currency and how to use it.