Hi @Yaz sorry to step back into your thread but why you do not use background video? Your video have only 8mb and WF limitation is 30mb max. Once video is uploaded it will play automatically. If you would like to stop video after first run here is thread from this forum.
if you would like to see how it is set up here is link to Read Only link and live preview
But of course it is how I will do that and it may not be what you are looking for.