Safari not playing videos due to missing functions when using /files

[Mar0xy]

💡 Summary

We got a report on our fork that safari does not play videos due to the videos missing a byte range header and another function with a ton of information about them: https://git.joinsharkey.org/Sharkey/Sharkey/issues/292

Copy and Pasted from linked issue:

(I don't know if this affects S3 storage as well)
Starting playback of any video hosted in /files does not work in Safari or any browser on iOS/iPadOS. This also affects Safari on macOS.
Safari requires Byte-Range support for video playback, see the Safari Web Content Guide.
Setting some headers is not enough, since Safari actually first sends a request for bytes 0-1 and then checks the response.

Here is another writeup of this behaviour, although there are many others.

🥰 Expected Behavior

Videos should play

🤬 Actual Behavior

Videos do not play

📝 Steps to Reproduce

1. Open any video on safari

💻 Frontend Environment

From reporting user:

* Model and OS of the device(s): iPhone 15, iOS 17.2.1
* Browser: Safari / AppleWebKit 605.1.15
* Server URL: shonk.social
* Sharkey: 2023.12.0 (equivalent to Misskey 2023.12.2)

🛰 Backend Environment (for server admin)

No response

Do you want to address this bug yourself?

• Yes, I will patch the bug myself and send a pull request

[kakkokari-gtyih]

Working on it in #12909

[kakkokari-gtyih]

Misskey本体の実装としては完了（メディアプロキシにはバイトレンジリクエストが実装されていないので別途対応する必要あり）
misskey-dev/media-proxy#11