Will the AirPort express allow me to route only iTunes to my speakers, or does it work with any music/movies/any sounds playing on my laptop?

For example, Netflix. Would I be able to watch Netflix on my laptop, with the sound from the speakers I have plugged in to my AirPort Express? This would be convenient if I want to sit on the couch near my desk/speakers and don't want to put headphones in. I am also wondering about music saved in Google Play, movies in VLC media player, etc.--ideally this would route all sound playing on my laptop to the speakers.

AirPort Express

AirPort Express

Product No Longer Available

No Answers have been submitted