David Copperfield makes predict

WOW!!

He thought that he(Richard) spelled it differently and he didn't hear him so he just put dick. A nickname for Richard.

didn't he escape from alcatraz in this special? why cant i find it?

it isnt on youtube-.- more people should upload dc videos

dick is a short name for richard (nickname)

the people who say lonely nooo!!! also on it,. it give extra time to someone behind the wall to reach David hand

when he takes the knife to open the enveloppe, he gets the envelope from someone behind the wall

No he doesn't. his right hand AND envelope are on the wall, leaning against it as he steps up to get the knife.

Yes he does. He is holding the enveloppe in front of the wall and press it with his thumb against it. With his other fingers someone gives him the enveloppe, he pulls back and pretend to slide it out of the enveloppe. In fact he pulls the copy "out" of the enveloppe

You are correct.