You can always update all of the metadata associated with a salon media element. These include, any metadata you can access through media manager such as “tags”, “questions”, “title/description”, “active dates”, ‘individual/group modes” etc. You can access the media manager from salon repository or from salon-all media. You must be the owner of the media to update any media.
If you would like to change the content of the media, you will have to remove the media, and then upload new media.