Hidden media is not viewable or playable by any member of V-TIP except the owner of the media.
Hidden media, if embedded in a blog or forum or elsewhere will not be seen or played.
It will not appear in the common areas of the site (home page, categories page, etc).
However, members can embed hidden media on their profile page to make it viewable to the public.
When embedding to the profile page, the view settings for the container are overridden by that of the profile page.
See profile page tutorial for more information.