When people say that, it’s always a lie:

There’s a coarse joke about how when you hear a certain statement, it’s always a lie. I’ve discovered that modern technology has given us a new statement that, when you hear it, is also a lie. This lie has probably been around for over a hundred years, but it can’t be much older than that, and it has become popular only recently. Here’s the setting:

You are listening to, or viewing, a podcast or some recorded production.

Somebody does, or says, something embarrassing. Then you hear the lie, and it is always a lie:

Don’t worry, I’ll edit that out.