The first thing that I did after entering docs website for this plugin was to try and play that video:

And I don't mean to _preview it_. I thought that the demo is in that video. I didn't notice that the video is already inside the editor. The video shows an editor so it is easy to think that you need to play it. I understood what's going on only after failing to "click" it a couple of times.
I'd go with a different video, something generic, like in Vimeo's case.
Good point :D
Maybe this one? https://www.youtube.com/watch?v=ZVv7UMQPEWk
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Maybe this one? https://www.youtube.com/watch?v=ZVv7UMQPEWk