I didn’t bring this up as a joke. Look into Dave McGowan and his book “Weird Scenes Inside the Canyon” about the laurel canyon music scene and the ties to military intelligence. Here’s a good interview on the beatles, that is recent, concerning the same subject.
https://www.youtube.com/watch?v=AWpLLYhTjHs&t=1300s
you can download these with various websites, but I like mp3fy.com. Once an mp3 file you can listen to it from your phone anywhere.