Hey Trish,
could you please check if you’re using the full URL of the video in the content area of the project which corresponds to the tile (i.e. https://www.youtube.com/watch?v=mTVpFWBjYIo instead of https://youtu.be/mTVpFWBjYIo), and that the “Playable video in masonry tile (only for “video” format)” setting has been checked.
Sincerely,
Andrii / Satori Studio