Three videos: SET amps, Chesky, Gould

Three videos for your delectation.

OCD Mikey does an interesting one on SET amps.
https://youtu.be/VFHP_zvgaoc

OCD Mikey does another one with David Chesky. Chesky is very refreshing to listen to. Knows his stuff, loves good sound, realizes how variable tastes are, knows that one need not spend untold thousands to get good sound provided some basic parameters are respected (room!).
https://youtu.be/WykgotJA9Kc

Last video is on different pianists reacting to Gould. Good channel.
https://youtu.be/dgUnUd9oBSc