How do I loop live video with Vizzie?

Hello everyone,

I am pretty new to Max and have run through the majority of the tutorials.

I am running a document camera through all the effects in vizzie, and would like to be able to loop a small section of the affected video output while changing my set up in a live situation.

Every loop I find or create is just looking for the camera itself and I cannot for the life of me figure out how to go from a Grab to a Kalido to a loop.

Any help would be appreciated!

Thanks :)