Would you be interested in listing some non-programming tech channels? EG TheSignalPath for (mostly RF) electrical engineering, Stefan Gotteswinter for machining, etc?
I'm looking for something similar. So thanks for at least letting us know about TheSignalPath.
Also the amp hour, I feel, is mostly about embedded but they have some interesting interviews in their archives.
For example the was an interview with Ronald quan. he wrote a cool book called make your own transistor radios. Also a couple with Michael Ossmann, the hackrf creator.
Otherwise I usually rely on the IEEE communications surveys and tutorials magazine to keep abreast of what's happening.