Fixed bug in previous checkin. Now passes correct  _session to the method. Also removed unused Guids from MediaPlayer as they are now only used in VideoPlayer
Revert "Fixed bug in previous checkin. Now passes correct  _session to the method. Also removed unused Guids from MediaPlayer as they are now only used in VideoPlayer"

This reverts commit 5d46e00855b061220e078293386cf172d6d8aba7.
Fixed bug in previous checkin. Now passes correct  _session to the method. Also removed unused Guids from MediaPlayer as they are now only used in VideoPlayer