Note - Your video must be uploaded to YouTube or Vimeo in order to be attached
#1 - Go to your listings section
Go to your listings via "Manage Listings" tab at the left menu of your backend.
#2 - Find the Listing you want to add a video to and click on "Edit"
#3 - Attachment tab - Copy & Paste Link
Click on "Attachment" tab and scroll down to find "Video and Home Tour" Section.
Now you can copy-paste your link in the box depending on where your video is hosted, the "Youtube Video" or "Vimeo Video", and click on the "Link" button to link the video.
#4 - Verify!
Verify the video preview frame is below the field! If not, check the URL first. If the URL is valid, make sure the Youtube or Vimeo video settings are set to allow embedding on 3rd party frames.