I have set the first clip to play automatically by adding 'autoplay=1’ within the vimeo code, and all works well in Safari, Chrome and Firefox on my mac. But on my iPad, the video overlays and transport bar don’t appear on the first video and it takes 2 clicks to pay the clip. On an iPhone, I can only see the top 2-3 millimetres of the video clip and from then on the content is hidden. Is it possible that I might have altered your code to make this happen, and are you able to find out if I have by looking at the source code?
Video auto play is disabled on iOS and Android. It's a limit from the device. And you need to remove the manually added autoplay=1 from the Vimeo URL.