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Video isn't just about pictures,

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it's also about sound.

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Without the audio you would have to guess what this film is about.

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Frustrating, isn't it?

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Not knowing what's going on.

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That's the situation for everyone who can't hear.

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Captions make videos accessible.

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Which is also handy for people who want to watch video in loud environments.

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Or where you need to be very, very quiet.

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Web accessibility: Essential for some, useful for all.