The WCAG ten
Captions, transcript, audio description, autoplay, keyboard access, focus, flashing, contrast, and pause control.
WCAG 2.2 gives specific requirements for prerecorded video: captions for audio (1.2.2), a transcript or media alternative (1.2.1), audio description when visuals carry information that narration omits (1.2.5 at level AA), user control before sound plays (1.4.2), and keyboard operation with visible focus (2.1.1, 2.4.7).
Many failures are easy to find and correct. Auto-captions can fail 1.2.2 when they change a name or number. A demo can fail 1.2.5 when the narration says "click here" and only the screen shows the target. A hero video that starts with sound can fail 1.4.2. The checklist gives context for each check.
Captions deserve the mechanical treatment on top of the judgment call, because a caption file can be present, accurate, and still broken: overlapping cues, sub-second display times, three-line walls of text. When you add the file, it runs through the same engine as the caption validator and the findings land in the same report.
The report is deliberately formatted for the workflow that follows: pass, action needed, or review per criterion, each with its WCAG number, downloadable as plain text. Accessibility work moves when it is a ticket with evidence, not a sentiment.