Very cool video
And to answer the question about amazons..
Our amazon can be incredibly loud when she's having fun or really excited like when one of us comes home from work or when we wake up in the morning, otherwise she tones it down for most the day. She's at her noisiest in the evening around 9 or so and in the morning when we're getting ready for work.
Yesterday she got curious to our other bird's cage with a play top and decided to explore it... I guess she was impressed because she was like a kid opening his birthday presents and geting everything he wished for and then some... except about 100 times louder
As far as her being a pet goes, she's a total riot with all her funny antics so she's just a blast to be around, especially when she gets excited, but for the most part she's very friendly and very loving, a true sweetheart of a bird. She always wants to be with us or on my shoulder, and has the most gentle beak of all our birds. I can fully trust her to groom my eye lids if she so desires...
Now if she doesn't want to be handled or messed with, she does give plenty of warnings like growling, eye pinning, nape feathers fluffed up, or talking in a very deep voice, she will eventually give a gentle warning nip if someone just don't get it way before she gets violent... She's not agressive at all, but I'd never push her that far either.