Nick Sibicky is (by the sound of his voice) a North American go player with a YouTube channel with some 350 lectures on go as of 2019-05-13. His lectures include game reviews and teach joseki and many other subjects. They are typically about an hour long or a little less.
- His YouTube? channel: https://www.youtube.com/channel/UC_msctwlIh2cwM8yAtaju1A