Add new event user-interacted event so we know we can send play() / setVolume() and setMute(false)

[DATEx2]

Expected Behavior

To be able to add external buttons such as volume on/off, play/pause.

Actual Behavior

Currently adding the buttons, of course outside the iframe causes the vimeo player to trigger errors

NotAllowedError: play() failed because the user didn't interact with the document first. 

Steps to Reproduce

Add a video to a page
Add a button and when you click on the button execute player.setMute(false); player.play()
You will be getting the above error, even if your button is positioned absolutely in top of the iframe.

Adding this event would let us know to create the customized buttons, just when the user has already interacted with the video, hence that they would also be working - as otherwise, they would fail if the user hasn't interacted with the page just yet - and there is absolutely no possibilty to know when he interacted already with the iframe video or not!!

The lack of this event makes the outside buttons rather unusable - so please implement it ASAP.

Thank you