Embedded WebM file fails to play on iPad

[Koischappi]

💡 Summary

WebM video files fail to play on iPadOS browsers (WebKit).
The same videos play on desktop computers, and MP4 files play without issue.

🥰 Expected Behavior

Play an embedded WebM file within a post.

🤬 Actual Behavior

The length of the video is indicated as 0 seconds, and pressing "play" does not show a loading animation or the video itself. The only sign that the "play" action has been registered is a change in the icon.

📝 Steps to Reproduce

1. Open this post (cw: spiders) on an iPad internet browser.
2. Attempt to play it.

📌 Environment

Misskey version: 12.118.1
Your OS: iPadOS 15.6.1
Your browser: Safari, Google Chrome

[pixeldesu]

Safari on iOS/iPadOS does not support WebM.

[Koischappi]

I see. Thank you for your prompt answer and apologies.