video don't use alt-attribute

[aschei]

Describe the bug
Embedding a video with an alt-text will be rendered using the structure

<figure>
  <video/>
  <figcaption>(alt text goes here)</figcaption>
</figure>

Screenreaders handle alt-attributes quite nicely and struggle with the figcaption-Element (which also has a different meaning as the alt-attribute).
The alt-text should go into an alt-attribute at the video-Element.

To Reproduce

Steps to reproduce the behavior:

1. Post a video with an alt-text
2. Look at the source code of the post.

Expected behavior

the <video> element should contain the alt-text in the alt-attribute.

Details

• Platform: desktop
• Platform version: current
• App version:

[mozzius]

Hi! I wasn't sure what the correct way to provide alt text for a video is - <video> does not support the alt attribute. Would aria-label be more suitable than a <figcaption>?

[aschei]

Thx, @mozzius for looking into this, much appreciated. I did a little research, and you are right, alt-tag is unfortunately not suitable for the video tag.
There is <track kind="description" sub element as the perfect way to support visually impaired users, but it requires an audio track describing the video - not text.

I suggest to follow "Example 1" here: https://www.w3.org/WAI/standards-guidelines/act/rules/c3232f/proposed/
(Simply add the description below the video in text element.)

With css-styling this can be done in a way that does not limit other users (e.g. having a small "ALT" tag that shows the description on click or something).

Other than that I will check with visually impaired people in my bubble if they can refer to perfect examples of videos with screen-reader-compatible textual descriptions in other community driven platforms.

Looking forward, you guys are awesome.

[mozzius]

Yeah - is just the subtitles, which we support in addition the alt field. Thank you for looking into this!