To be honest, when I have problems with people finding out how I did it,
I take them seperatly afterwards and ask them how they figured it out.
It seems stupid, but it works.
Please remember for this trick that you shouldn't be too nervous and moving too much. Spectators look where you look, so shift your attention at the packet with the wrong card. Really believe it is there. This ensures that they will shift their gaze to that packet. Why shouldn't they believe it's their card
Thanks, that is good advice. I'll certainly do that. Since this seems to be a live thread. I may just post another video of more normal ACR.