If you do not yet know how to put a video from Vimeo on your website. First check out this knowledge base article If you want to show video's on autoplay with a single media you should always have them streamed from Vimeo. Follow the steps below:

1. Upload your video in Vimeo and copy the link which looks like this: https://vimeo.com/784995501 !Note: Vimeo may copy your link like this: https://vimeo.com/784995501?share=copy > delete the share=copy
2. Then you add ?background=1 after the Vimeo link. Which results in: https://vimeo.com/784995501?background=1

3. Now head back to your website page where you want to show the video. Go to the single media element. Click the pen icon to edit.4. Click the plus icon on media

5. Paste the link in the embed tab6. Click add media at the bottom, and save changes7. Click update