The best way to get rid of tension in the upper body is to build your power in the lower body: the belly/core and the lower back.  The stronger your core, the more your sides will relax and so will your spine THEN open and release the neck, shoulders and chest.
 
In this case:
Relax upper body - 32 mins
Beginners neck & shoulders - 38 mins
Lower body power/Upper body release - 48 mins