For me I really do enjoy watching some of the Locking picking lawyers content and he is an expert when it comes to picking locks!
Another few are mental outlaw (although I think everyone knows of him here) and Steven Bridges who makes videos on card counting at casinos and he shows how much he wins/loses from playing
Thinking and Tinkering is a great one. Older engineer making all sorts of devices and contraptions just because and he wants to see if he can make them better (and sometimes he does)
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Thinking and Tinkering
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