You can create assets (videos, standard (image) gallery, and links (web links)) through publication edit view.
Filter - Filter assets based on the criteria's below:
By status: The filter consists of the following statuses and they are:
By Name: The name of an asset.
By Id: A unique identification (Id) of an asset.
Clear filter - Removes filter terms used in the text box.
Category - A global classification of all assets and can be grouped into one/ more categories. The application can filter the content based on the categories set.
Read more here: Category management.