Hi forum, i like to add an info for autoplay on vimeo videos.
If you want the autoplay option on your vimeo iframe videos
simply add ‘?autoplay=1’ at the end of embed video url.
“http://player.vimeo.com/video/nameofvideo?autoplay=1”
More on embedding here: (looping,colors,pausing etc)
https://developer.vimeo.com/player/embedding