If THAT is true, then maybe my stupid idea proposed as a joke is actually best, if you use 1920x1080 HD-camcorder in front of 1920x1080 HD-display with proper lighting/filtering/whatever.They don't reveal resolution and speed; I guess it's still 640x480i max.
I purchased one of these devices, the ADSTech Pyro A/V last year.
PYRO A /V Link
It's a Consumer Grade Capture unit that is Firewire output and can capture Component Video to 480i, S-Video and Composite. It will also Output Component Video to a TV Monitor. You would have to set your 622 to output 480i for it to work with this unit.
Let us know what resolution it support.