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I thought the Lego stuff was a cool visual aid at first, but actually upon viewing the video it was a bit distracting. Just a voiceover and someone drawing on a blank screen or picture slideshows (a la late night shows) would probably work a lot better. It’s probably hard to stand out in the YouTube crowd these days but I’m not sure if this is the way forward.
Sorry to be a put down, but thought my honest feedback might help.