system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How was wrestlemania 1 shown on closed circuit TV?

What does ppv do differently than CCTV?
gpt
PPV brings it into your home. A closed circuit feed is more costly to set up, so it was in larger venues.

So, for Wrestlemania I, you would drive to a local event center, the kind that would host concerts and the like. You'd park, you'd pay your admission to get in, and then, on large screens, you'd watch WrestleMania with 15,000 other people.