Does this (transmission) sound normal?

[subverse]

Edit: Video link removed, Issue resolved, it went back to the dealer, admins can delete, thanks

Hi, I just bought a 2009 Yaris RS. Only 100 were ever imported to New Zealand so I don't have a way to compare it against another right now. It has what I think is a differential whine on positive throttle, noise goes away on trailing throttle.

I've made a video of the noise, and would appreciate it if someone with one of these, or has experience with them, can take a look and see if it's "normal" I've read in some places that this model can be a bit noisy.

The video starts on trailing throttle, and positive throttle, (and noise) starts about 12 seconds in.

Many thanks.