Mattias Krantz is a Swedish engineer who modifies instruments mostly by having really dumb or funny ideas, and then being stubborn and persistent enough not to give up where any sensible person would. He has done a number of weird and whacky pianos (including one previously featured on mefi) but has more recently moved on to guitars: a petrol-powered electric, an acoustic strung with Madagascan spider silk, and a spinning necked guitar which he then tries to play. Now his most recent guitar project is all about speed: picking speed, specifically. Here is his concept for a thousand-pick auto-picking guitar, like a hair metal hurdy-gurdy. [MLYT]

Nearly a year and a half ago, Joseph Newton did an excellent video about Cursed units. Now he's back with Cursed Units 2: Curseder Units! From fuel efficiency in square millimetres to the barrer, the definition of which has cm appear no less than four times, you're sure to encounter some weird (metric) units you'd not heard of. [2LYT]

In which youtuber f4mi talks famiclones, bootleg software, and demake ports of popular games, long after the West had given up on the NES, with a focus on one very special demake in particular... [SLYT]