the cameras, editing software and hardware, DVD authoring and duplication equipment and services used by "the professionals"? That would be a good place to start...

Shooting the routine with the camcorder close you works to have you "look like (you are) relatively close to the viewer"... Or backing the cam up a bit and moving in with a little zoom. Thats called "framing" the shot.

Multiple cameras at different angles and distances and shooting the routine a BUNCH of times so there's a selection of clips is another way... Then there are tripods, cranes, lights, mics... and lots more. The camera and editing applications are merely two pieces of a much larger system.