The "Video" tile type lets you embed an MP4 or YouTube video.

Embedded YouTube video: This example embeds a YouTube video in the tile. You can get the video URL by�clicking the "Share" button on YouTube and then copying the URL form the box below the button. Target:EmbeddedURL:https://youtu.be/_9fGXZ4ocp4
Link to YouTube video: This example links to a YouTube video and automatically displays the video cover image. The video is opened in a Sharepoint dialog window. You can get the video URL by�clicking the "Share" button on YouTube and then copying the URL form the box below the button. Target:DialogURL:https://youtu.be/wnr2OINJzho
Embedded MP4 video: This example embeds an MP4 video in the tile. Target:In PlaceURL:http://somedomain/Videos/testvideo.mp4
Linking to videos using the "Icon" tile: These example embed a YouTube link and an MP4 video link in the tiles. Title:Youtube LinkContent:fa-youtube-playTarget:DialogURL:https://youtu.be/h3gjm7ZDtYE