The Time Travel Trick (Conjuring Trick Idea)

What the audience see:

The magicians apprentice wheels a big screen TV in front of the audience and stands next to the TV.

The magician then tells the audience that earlier that day he filmed his apprentice holding up a card.

Then he shows the audience a video recording of his apprentice holding up a card upon which is written these three words, “Time Travel Trick”.

He then switches off the video and asks his audience to give him three words; any three words.

He then switches on the video again and replays the recording of his assistant holding up the card. Instead of “Time Travel Trick” what is written upon the card are the 3 words chosen by the audience.

How the trick is done:

The video recording, or at least the second video recording, is not a recording but a live tv transmission and the person that the audience sees on the screen is not the apprentice but her twin sister who, just before the audience sees her, has written down the 3 words they chose on the card.