If a 2 Filter is visible, that means that the Media Manager and Video Portal displays the filter as an option when searching.
Whether a filter is visible or not is defined during creation of the filter:
It can also be updated in the The Details panel.
...
For this example, the Media Manager uses a search called DigiZuite_System_Framework_Search:
The filters have been sorted by the "Visible filter" column.
The visible filters in this search are an asset type filter, a start_date filter, a keywords filter, and a menu filter. Because these four filters are visible, they can be selected as filters in the Media Manager:
Close up:
If a filter is not visible, it can still be used to filter out results, but the filters' parameters cannot be supplied by anyone other than the client code.