I've let Alfie listen to (carefully chosen) youtube videos more or less since we got her, and although she listens intently, I never heard her copy any of them until a week or so ago! We were watching a video on Youtube called "I love you strong and tight" (the sweetest video ever!), at least I think it was that one, we've watched a few of Emma's vids! At one point Alfie flew off the back of the couch where she had been watching, and up on to the top of her cage and said "hi Emma!"
She had obviously been paying attention!
x