Go to http://worldwide.blackberry.com on your computer.
Find the download section on the website to download BlackBerry Link.
Download and install BlackBerry Link on your computer.

Slide your finger down the display starting from the top edge of your mobile phone.
Tap Settings.

Tap Storage and Access.

Tap USB Connections.

Tap Connect to Windows or Connect to Mac depending on the operating system on your computer.

Connect the data cable to the phone socket and to your computer's USB port.

Start a file manager on your computer and find your phone in the computer's file system.

Go to the required folder in your mobile phone's file system.

Highlight the required picture or the required video clip and move or copy it to your computer.