Animated avatars play constantly and cannot be stopped (WCAG 2.1 / 2.2.2 violation)

[Mikaela]

Describe the bug

element-hq/element-web#18442 again, when you join a room where someone uses an animated avatar using a mediarepo/homeserver with support for that, they play constantly and cannot be stopped.

• Understanding Success Criterion 2.2.2: Pause, Stop, Hide

To Reproduce

1. Use homeserver that plays animated avatars such as the-apothecary.club or feline.support.
2. Join a room that contains animated avatar or DM @cat:feline.support
3. Observe the avatar playing constantly.

Expected behavior

For accessibility reasons, there should be a method of stopping the avatar. Personally I am on autism spectrum and animated avatars negatively impair my ability to focus on reading or writing text making Hydrogen not great for communication.

Screenshots

I don't know how to animate screenshots, please refer to previous link.

Desktop (please complete the following information):

• OS: iOS
• Browser Safari
• • Version 16.0 (20A5339d)

Smartphone (please complete the following information):

• Device: iPhone SE2020
• OS: iOS 16.0 (20A5339d)
• Browser Safari
• Version 16.0 (20A5339d)

Additional context

The web content accessibility guidelines expain this better than I can.

• https://www.w3.org/WAI/WCAG21/Understanding/pause-stop-hide.html

I use iOS Accessibility features regarding motion and decrease motion and prefer "ristihäivytyssiirto", disable message effects and disable playing of video previews.