Yeah, there is an awful lot of really fantastic content produced on YouTube now. It's getting to the point where there is so much quality that discovery of it

Yeah, there is an awful lot of really fantastic content produced on YouTube now. It's getting to the point where there is so much quality that discovery of it all is getting hard. In the spirit of your answer, I would say these other channels are also outstanding in their categories: Any of Brady Haran's (Numberphile/Sixty Symbols/Objectivity etc) Fully Charged Show (electric vehicles/renewable energy) Nick Carver (film photography) Pine Hollow Auto Diagnostics (watch a few to grok the style) Kevin Mullins (Fuji users photography and more) Explaining Computers (hard to categorise, that's why it's good) There are many many many more but I think most of those are really widely known, perhaps some of the above aren't quite as widely watched and they're very worth it.