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There is something that separates Integza, colinfurze et al, and Applied Science, Huygens Optics et al, and another in guys making thesis/paper worthy developments like [0],[1]. They are technically all amateurs, in the sense that their performances do not involve organizational fundings or decisions, and I have to admit that entertainment value decreases in the order I mentioned these channels, but it seems to me as if there is a sloped ceiling for technical excellence of YouTubers, proportional to their popularity, and it isn't calming to think about it.

0: "My recreation for Yamanote line trains(E231-500/E235-Series) using self made VVVF inverter" https://www.youtube.com/watch?v=i0B2bvd9rFQ

1: "I put a biped robot on a bicycle" https://www.youtube.com/watch?v=SqBw7XapJKk