I'm not much of a YouTube user but I did search for a Sportscaster card commercial. I don't remember seeing this commercial as a kid but I was a subscriber for about a year so maybe I did see it.
Here is a link to one commercial for these cards. I don't know if they created others.
1978 Sportscaster Commercial
"For all of you youngest out there", as Steve Stone likes to say, when the dad got up, walked to the television and turned it off there was a reason for it. The reason - that's how televisions worked. One also had to get up and walk to the television if you wanted to change channels.