Once you're logged in you will see your listings that are ready to market. Click on the listing you want to edit.
Click on the "Edit" button within the Listing Site NOW! tile.
Within the listing details section, locate the space to add a "Listing Video." Paste your video link (YouTube, Vimeo, etc) into the box. Click "Done" when finished.
When previewing your Listing Site NOW! you will see the video embedded below the property map.