Subscribe for good luck - Most Popular videos - https://www.youtube.com/watch?v=72qmtr41iWU&list=UULP3MF3KCtKQkCudSvNpk3BOg
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The inventions are cool, too bad the video sucks. It doesn’t really give us any information at all on the inventions that it’s about except for what they’re called
thanks for the information, i will improve for my next video
