I recently discovered Mend It Mark. It's quite relaxing watching him fix electrical things. This 80s Aiwa tape deck is a good one (in 3 parts)
I rather like Hans Rosenberg's PCB design videos. Mind you, he is an electronics professional as well as a hobbyist and he is a former colleague of mine.
https://www.youtube.com/channel/UCeMbZC8Uv9uJArqFQnFCDNQ
https://www.youtube.com/channel/UCeMbZC8Uv9uJArqFQnFCDNQ