InterPro - Teaching & Learning - Accessibility - Captioning

This document compares the closed captioning tools available for EPD NCPD and Credit Courses

Closed Captioning


Closed Captions are a text version of the audio content within a video, synchronized with the action on screen. Captions should be accurate, use correct punctuation, state in brackets who is speaking at the start of a new speaker, and indicate relevant ambient sound or emotional tone (Definition from Create Accessible Video & Audio Content)

UW-Madison strongly recommends providing captioning for all audio and video content. Captioning increases accessibility and provides all learners with an additional way to learn.

UW-Madison requires captioning if a learner within a credit-course had a disability accommodation. Please contact LDT for more information on ensuring learners have the tools they need.


There are three main ways to caption videos for courses.

3Play, a paid service. 

Kaltura Machine captioning.

YouTube Studio's automatic captioning.

Application and Limitations

Comparison Chart





CostPer minute cost from FreeFree
MethodContract service Machine capture (uses technology to create captions)Machine capture (uses technology to create captions) 
Ease of UseEasyRequires human intervention for ADA appropriate captionsRequires human intervention for ADA appropriate captions
Time to Production15 days for the lowest cost optionVaries, between a few minutes and a few hours + the time to manually clean up captionsVaries, this process is automatic and does not have a set time. It also requires additional time to manually clean up captions
LDT/UW SupportedYes. Work through LDT for 3PLay ConversionYes. LDT will provide guidance on using Kaltura's machine captioning and editing captionsMinimal support from LDT. DoIT does provide directions on using YouTube Studio's capturing feature.

3Play is a paid service. If you would like to use this service, please contact Online Support.

Kaltura and YouTube use automatic captioning and require someone to manually fix the captions generated by the software. 

Kaltura has a specific process for captioning that makes requesting and editing captions straightforward. For more information, see Kaltura - Ordering Machine Captions for Media in Kaltura MediaSpace [UW-Madison], or if you are part of EPD, see below for the internal process. You can check on pending caption requests within Kaltura, and you will receive an email when the captioning process is finished.

YouTube creates automatic captions for any video uploaded to its site. This process is automatic, but this also means that it can be difficult to know when the captioning has been completed. YouTube's official statement on time commitment is: Processing time depends on the complexity of the video's audio. No alert will be sent when the captioning is complete.

EPD Kaltura Captioning Process

If you are working on an EPD course, please contact Online Support for more information on captioning.


EPD's Cost Calculator for 3Play transcriptions

Using Kaltura for Captioning

Using YouTube for Captioning

KeywordsLDT, edtech, technology, learning technology, tech tools   Doc ID103197
OwnerLearning Design and Technologies TeamGroupInterdisciplinary Professional Programs
College of Engineering
Created2020-06-18 14:35:11Updated2021-06-30 15:53:31
SitesInterdisciplinary Professional Programs
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