Today I did the same search and found these three videos on Samsung’s official YouTube channel for the Netherlands. They’re all roughly 33 seconds long. One demos the “Sound Shot” feature, which is basically a short sound clip attached to a still photo. Another demos “Group Play”, which allows several GS4 units to play the same song, thus making the song louder. And finally there’s a video showing a woman using the S-Translater app in a cab and at the dining room table. Enjoy.
Update: Android Central has just uploaded this 60 second commercial to their YouTube channel. It’s definitely not like the three videos above since it focuses mainly on the hardware.