The Web Content Accessibility Guidelines 2.0
WCAG 2.0 Guidelines
The Web Content Accessibility Guidelines relevant to the accessibility of Videos:
Video player
| Guideline | Description |
|---|---|
| 1.1 | Text Alternatives: Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language. |
| 1.2 | Time-based Media: Provide alternatives for time-based media. |
| 1.3 | Adaptable: Create content that can be presented in different ways (for example simpler layout) without losing information or structure. |
| 1.4 | Distinguishable: Make it easier for users to see and hear content including separating foreground from background. |
| 2.1 | Keyboard Accessible: Make all functionality available from a keyboard. |
| 2.3 | Seizures: Do not design content in a way that is known to cause seizures. |
| 2.4 | Navigable: Provide ways to help users navigate, find content, and determine where they are. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
Captions
| Guideline | Description |
|---|---|
| 1.2 | Time-based Media: Provide alternatives for time-based media. |
| 1.4 | Distinguishable: Make it easier for users to see and hear content including separating foreground from background. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
Transcript
| Guideline | Description |
|---|---|
| 1.2 | Time-based Media: Provide alternatives for time-based media. |
| 1.3 | Adaptable: Create content that can be presented in different ways (for example simpler layout) without losing information or structure. |
| 2.4 | Navigable: Provide ways to help users navigate, find content, and determine where they are. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
Audio Descriptions
| Guideline | Description |
|---|---|
| 1.2 | Time-based Media: Provide alternatives for time-based media. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
WCAG 2.0 Success Criteria
The Web Content Accessibility Guidelines Success Criterion relevant to the accessibility of Videos:-
Video Player
| SC | Description |
|---|---|
| 1.1.1 | Non-text Content: All non-text content that is presented to the user has a text alternative that serves the equivalent purpose, except for the situations listed at http://www.w3.org/TR/WCAG20/#text-equiv |
| 1.3.2 | Meaningful Sequence: When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined. |
| 1.4.2 | Audio Control: If any audio on a Web page plays automatically for more than 3 seconds, either a mechanism is available to pause or stop the audio, or a mechanism is available to control audio volume independently from the overall system volume level. |
| 2.1.1 | Keyboard: All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except where the underlying function requires input that depends on the path of the user’s movement and not just the endpoints. |
| 2.1.2 | No Keyboard Trap: If keyboard focus can be moved to a component of the page using a keyboard interface, then focus can be moved away from that component using only a keyboard interface, and, if it requires more than unmodified arrow or tab keys or other standard exit methods, the user is advised of the method for moving focus away. |
| 2.3.1 | Three Flashes or Below Threshold: Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds. |
| 2.4.4 | Link Purpose (In Context): The purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context, except where the purpose of the link would be ambiguous to users in general. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
Captions
| SC | Description |
|---|---|
| 1.2.1 | Audio-only and Video-only (Prerecorded): For prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labelled as such:
|
| 1.2.2 | Captions (Prerecorded): Captions are provided for all prerecorded audio content in synchronized media, except when the media is a media alternative for text and is clearly labeled as such. |
| 1.4.3 | Contrast (Minimum): The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following:
|
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
Transcript
| SC | Description |
|---|---|
| 1.2.1 | Audio-only and Video-only (Prerecorded): For prerecorded audio-only and prerecorded video-only media, the following are true, except when the audio or video is a media alternative for text and is clearly labelled as such:
|
| 1.2.3 | Audio Description or Media Alternative (Prerecorded): An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text and is clearly labeled as such. |
| 1.3.2 | Meaningful Sequence: When the sequence in which content is presented affects its meaning, a correct reading sequence can be programmatically determined. |
| 2.4.4 | Link Purpose (In Context): The purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context, except where the purpose of the link would be ambiguous to users in general. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]
Audio descriptions
| SC | Description |
|---|---|
| 1.2.5 | Audio Description (Prerecorded): Audio description is provided for all prerecorded video content in synchronized media. |
Copyright © W3C 11 December 2008 World Wide Web Consortium [Status: Recommendation]