I’m not sure David Copperfield wanted this tape to get out, but it’s out for better or worse.
The “body switching” trick has been used numerous times in his acts and now you can see how it’s really done. You might not want to see this because it will take the mystery away.
It never occurred to me how simple this trick was. The reason for wearing black clothing is also explained in this video.
Maybe it’s just me, but now that I’ve seen how this is done it kind of ruins the “magic” in it for me. Hence the whole “keep it a secret” message at the end of the video.