Video description through Secondary Audio Program (SAP) 
Video description is audio descriptions of the action in a program, to help individuals 
who are blind or visually impaired enjoy the program. You enable video description by 
selecting one of the Secondary Audio Program (SAP) options.  
To hear video description narrations in programs that have them, turn on SAP. If there 
are multiple SAP options for a channel, such as Spanish and French, try each one to 
determine which setting carries the video description track. 
Note: 
Broadcasters provide video descriptions only on a small number of programs. If 
you are unable to hear video descriptions after following these instructions, the 
program you are viewing does not provide them.
 
For more details about video description, go to: 
https://www.fcc.gov/consumers/guides/video-description.