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When you use videos, be sure it has synchronized captions. If you include a video that already has captions, then you do not have to worry about this step. Something else that should be kept in mind is that any video/audio files should have a text transcript. If you insert the content as an object, you need to provide an alt text for it.
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Section
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8.1: Captions for Presentations:
Many people listening to your presentation may not be able to hear you speak. To fix this issue, provide live captions for your audience. To make captions visible,
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