Pretty cool. One of the vids I saw showed shredding cabbage, but just briefly.
In this vid it looks like there's a smaller hole he is sticking the cabbage in though, not the "potato sized" hole (chimney?) in the top of the lid. Whatever you call that extension/chimney.... It looks like there is a smaller opening inside the larger one and his pieces needed to be pretty small.
This is like my food processor. He could have taken the top part off each time to get bigger pieces in but it is easier just to shove smaller pieces in that little center hole.
Shredding cabbage in a food processor is pretty common knowledge, isn't it?