You can watch tons of Johnny Carson programs on YouTube.
https://www.youtube.com/user/johnnycarson/featured
with no commercials!
Since getting a SmartTV late last year, we now only watch YouTube programs and Netflix on the TV.
Yes, I got one of those SmartTV boxes - that and an antenna to supplement it with your over the air stations (there are more and more channels popping up these days) and a radio is all you need...no reason to pay thousands of dollars over the years on cable.