Sorry to hear you are having troubles playing your video.
We've had a few people experience this same issue and here is how we were able to resolve it!
Can you please try the following:
1) Please try using another browser and see if the issue persists (if the video plays, then we know it was a browser based issue)
2) Clear your cache/cookies
3) Make sure your current browser is up to date
These are the 3 most common fixes to this type of experience.
If this does not work, click here to see how to submit a ticket.