Comment by godelski

  > I prerecord all my live demos

That just sounds like a demo with more lying.

  > People are always impressed at how flawless my live demos are

Because they think it is live!

  > the i̶l̶l̶u̶s̶i̶o̶n̶ deception is perfect.

FTFY

Seriously... just call it a demo or pre-recorded. As soon as you call it "live" you've crossed into the territory of fraud.