If you do, I advise you to, as I do, purchase your bird seed in 25-kilo sacks, and not attempt to feed the cockatoos with a supermarket seed bell.
Those don't last.
(Available in HD!)
The loud scrapey-thud noises happen every time a 900-gram bird uses the microphone on top of the camera as a perch.
Extension of this behaviour brought the video-shooting to a halt when only about half of the seed bell was gone. But, as I said, you get the idea.
(I know it's not good to give them a small source of food so they fight over it. The regular seed I spread on the table, and on the deck itself, which greatly reduces the Skesis act.)