Add a Video
From the Core Site Administration page, scroll down to Videos and click on the Add button next to Videos.
If you have the video file hosted somewhere, you can paste the path to the video file in the remote video url field. In this case, leave the video field blank.
If you have the video file saved on your computer, leave the remote video url field blank and click on the video field to browse for your video file. Follow this article to ensure your video is optimized for Web Cube.
For thumbnail field, upload a thumbnail image of your video. The default thumbnail size for Web Cube videos is 120x70, but this may be different if your Videos template has been changed.
Enter the title and select the site, then click Save.

