After clicking on the video title of your choice, you will be directed to the Item Record. Along with the video's information, you will find the Call Number in the "Check Availability" section of the record. The Call Number is in the Library of Congress (LOC) form (more information on LOC Call Numbers).
The pictures above show that the videos are available by the green check mark and the Call Number is DVD/PR2823.A23 G664 2001 for the DVD and VID ND553.P5 P52 for the VHS. In order to check out a DVD or VHS you must take the title and call number to the library desk and someone will assist you.