You can add a video of your home to your listing. This is done on the photos page of your listing.
Not all MLSes allow videos, but for the ones that do, the video must be unbranded and contain no speaking/narration. Non-copyrighted, instrumental music is allowed.
Videos must be posted as links to a hosted site, such as YouTube or Vimeo. The MLS will not allow direct video files to be uploaded.
YouTube videos must also have the comments turned off.