When did the general fan base find out about the acoustic performances off Red after the webchat?

Did people know about it before the video came out in December?

Or was it all kept a secret and only the people who were there knew about it?
If she DID showcase some new songs there, if anyone was going to spill the deets on if she performed things after the livestream, it'd be that guy who wrote the massive blog post about the apartment party and grinding on Taylor since he didn't really seem like a loyal fan.

And loyal fans seem to be the best at keeping stuff secrets like with all that Shake It Off music video stuff.
