Content more people can use.
WHAT VIDEO REQUIRES
Captions, accurate Transcripts Audio description, where visuals carry essential information Sufficient contrast in on-screen text
WHAT CAPTIONS MUST INCLUDE
Speech, accurately Speaker identification, where unclear Important non-speech sound
WHY TRANSCRIPTS ADDITIONALLY
They are searchable, translatable, and usable by people who prefer reading.
WHAT AUDIO REQUIRES
A transcript Clear speech, well separated from music
WHAT IMAGES REQUIRE
Alternative text describing what matters.
WHAT GOOD ALTERNATIVE TEXT DOES
Conveys the information the image carries, in context.
WHAT IT IS NOT
A literal description of everything visible.
WHAT DECORATIVE IMAGES NEED
To be marked as decorative, so they are skipped.
WHAT TO AVOID
Text embedded in images, which cannot be read aloud or translated Flashing content, which can trigger seizures Colour as the only means of conveying meaning Automatic playback with sound
WHY FLASHING SPECIFICALLY
It causes real harm, and there are published thresholds to stay within.
WHAT TO CONSIDER ABOUT BANDWIDTH
That heavy media excludes people on limited connections.
WHAT THAT MEANS PRACTICALLY
Offering lower-quality options, and keeping files small.
WHAT TO TEST
Your content with captions on, sound off, on a small screen.
