yeah looks like they have been "shaved" with an auto clipper or some poor bastard did a really neat job by hand. They probably left them in the pots for easier handling, or even to account for the bud, make sure no one is taking any home with them. Gotta remember this was a sweat shop operation.
I love videos like this though. A big reminder what happens when you cut corners, make mistakes, and get too greedy with massive crops.
The Ona oil trick they did, you can actually buy a section of ducting with an oil cage inside and you insert however many blocks of Ona you want. AFTER the filter, of course =)