Using video content, you can add a video in your flow. This is commonly used for graphics or any other visual contents to help explain concepts.
You can ensure that your video starts playing as soon as the video content is loaded, by enabling Auto-play? option in the settings menu that appears when the question selected.
Additionally, you can set the image that you would like the responder to see until your content is loaded with the Loading image url option.
You also have the option to run your video in repeat by enabling Loop? and letting the responder decide when to play and pause the video by enabling Show controls to user?