For anyone wanting interesting YT videos for their kids (and not wanting to take anything away from OP's project), I highly highly recommend thekidshouldseethis.com. It's basically a curated stream of cool videos, and I would feel totally safe letting my daughter browse it alone (she never does because we usually watch them together, but the curation is that good). Videos on all sorts of topics, and good enough to be really entertaining for both kids and adults - I can spend an evening there easily. They also have a really fantastic gift guide.