Guess it's pretty simple but I can't get it to work:
[types field='video' autoplay='on' poster='[wpv-post-featured-image size='full' output='url']'][/types]
The video just doesn't starts, on every browsers I tried: hidden link
I took a look at this for you and the first time I loaded the page the auto play works for me, however when I tried again it stopped.
Can you confirm that this issue still occurs when you've disabled the non-toolset plugins ? Also let me know if this was working before and if you have any idea when it stopped working.
I must apologize for not able to give a definite answer as to what is the cause of the issue, as I mentioned it was not replicable for me even with your copy.
Perhaps more symptoms with appear in the future where we can say that this is the reason for it not working for you. You can close this ticket when you're ready.