Thanks. It should be the owner who submits it, but looks like he's not active these days. Hence again, this time with the hashtag:

Not ours, BTCJuniorClub just shares this cool video to help its author get more exposure: 'Bitcoin song for kiddos 🎶 Short Stories Built with LEGO'. Fun + Education by @fullsendhodl 📺 #BullishBounty