The Singular Dashboard doesn't host video files but if you need to play a few small video clips in your overlays, they can be hosted and accessed elsewhere. One easy and free option is to host video files on your Google Drive.
Simply upload the files to your Google Drive and follow the steps below for use in a Video Clip Widget.
1. Copy Video Shared Link
Right click on your video file and select "Get link".
Modify the permissions to "Anyone with the link" to make it accessible to the Singular platform. Then copy it.