Adding Chapter Markers
According to the World Wide Web Consortium (W3C), an essential aspect of making web video content accessible involves structuring content so that “The user can navigate by semantic structure…such as by chapters or scenes” (source). Adding chapter markers to uploaded video makes it navigable in the way the W3C describes.
Select your video and click Settings (1) to open the video control panel. Next, click Edit Subtitles and Closed Captions (2).
Click Add Chapters (3).
Click Upload Chapter (4) to upload your chapter marker file. When the upload is finished, select your chapter marker file (5). Click Add (6).
Click Chapters (7) to see the video chapters.
Adding Subtitles or Closed Captioning
According to the W3C, captions and subtitles “provide content to people who are Deaf and hard-of-hearing. Captions are a text version of the speech and non-speech audio information needed to understand the content. They are synchronized with the audio and usually shown in a media player when users turn them on” (source).
Select your video and click Settings (8) to open the video control panel. Next, click Edit Subtitles & Closed Captions (9).
Click Add Subtltle (10).
Select a language (11), then click Upload Subtitle (12) to upload your VTT subtitle file. When the upload is finished, select your VTT file (13). Click Add (14) to finalize your selection and add the VTT file to your video.
Click Closed Captions (15) to view closed captions during playback.
Adding Audio Description
According to the W3C, audio description “provides content to people who are blind and others who cannot see the video adequately. It describes visual information needed to understand the content, including text displayed in the video” (source).
Please note that an audio description track will be played along with the video’s original audio. Viewers cannot turn off audio description. We therefore recommend that you upload two videos: one with the audio description and one without.
Select your video and click Settings (16) to open the video control panel. Then, click Edit Subtitles and Closed Captions (17).
Click Add Audio (18).
Select a language (19), then click Upload Audio Description (20) to upload your audio description. When the upload is finished, select your audio description (21). Click Add (22) to add your audio description to the video.