Sharepoint 2013 : Working with media - Uploading and tagging media files

On the Quick Launch bar, click the Site Contents link.

On the Site Contents page, in the Lists, libraries, And Other Apps section, click the asset library with which you want to work.

In the library, click the New Item link.

In the Add A Document dialog box, click the Browse button to select a single image to upload

Click OK.

In the Metadata Input dialog box, fill in the relevant information.

Click the Save button.

On the Quick Launch bar, click Site Contents.

On the Site Contents page, in the Lists, libraries, And Other Apps section, click the asset library with which you want to work.

In another window, navigate to and open and the folder that contains the files that you want to upload in Windows Explorer.

Select the files that you want to upload.

Drag the files over to the section in SharePoint labeled New Item Or Drag Files Here and release the mouse.