TOGAF session video are buffering for too long

Hi,
I am not able play to video, it is only buffering and does nothing,but failed to play. The continuous revolving of Simplilearn icon is making me dizzy. It is really sad and demoralising to face such silly technical issue as it hindering my learning process. This is 3rd instance it is happening quite frequently. Kindly provide your support.

Thanks,
Kailash