Transcripts provide a textual version of the content that can be accessed by anyone.  Screen reader users may also prefer the transcript over listening to the audio of the web multimedia.1

Transcripts do not have to be verbatim accounts of the spoken word in a video. They should contain additional descriptions, explanations, or comments that may be beneficial, such as indications of laughter or an explosion.2    

Remember, the purpose of a transcript is to provide a text equivalent for the concepts covered in the visual and auditory parts of a video.

1"Captions, Transcripts, and Audio Descriptions." WebAIM: web accessibility in mind. WebAIM. 29 Aug 2013. Web. 17 Nov 2014. <>.
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