Lennon was murdered ten years after this appearance and has been gone for over thirty years.
A glimpse of what TV was like forty years ago.
This was pre-cable so there were only seven to nine channels available on the TV total. Obviously, there was no such thing as YouTube, but also there was no way to record programs and watch them later.
An event like this - an interview with John Lennon - was huge and captured a huge percentage of the population's attention.
I think the quality of attention people paid to programs like this was different from today because people believed they were not going to have the option to see it again.