This video demonstrates possible gestural controls for VLC Media Player. It's playing NASA clips, but the controls would work equally well with a music playlist.
Summary of the gestures:
Play/pause - Double pinch
Seeking forward/backward - Pinch and drag to the right/left
Volume up/down - Pinch and rotate clockwise/counter-clockwise
Next/Previous clip - Spread hand flick right/left
This is just one possible gesture set. All the gestures can be operated with either hand, but since we can identify which hand you are using, it is also possible to assign operations to specific hands.