some of the ones i'm subscribed to are big clive, tom stanton, alasdair beckett-king, cakejumper, tim of way out west, chronova engineering, susd, steve mould, vargskelethor, posy, venjent, caseyexplosion, steph sterling, ivan garcia, the my engines guy...
very few non-english channels get recommended to me, which is kind of a shame. but swedish youtube is just a cesspool. mattias kling, theswedishmaker, love hultén and seth everman are great but they don't post a lot.