sound

Hello, my cockatiel makes an interesting sound and I don't understand what it means: https://youtube.com/shorts/CStwKaQN9v0?feature=share Is he happy or sad?

My little approx. 15 week old Ringneck guy makes plenty of different sounds. From loud contact calls, to tiny and adorable peeps. However, there's one sound he makes that I can't quite pinpoint. I've tried looking online for any info about bird sounds, but I can't find anything that sounds like...

Hello! New guy here. Our cockatiel, spike, is a rescue and she is the first bird i've bonded with and cared for. Almost all her behaviors in some way or another make sense to me so far, all except this one. I keep swinging between that she's literally learned to mess with me get what she wants...