Patreon Embedded (non-Youtube) videos not loading

OS/Platform

Windows

Installed

https://ungoogled-software.github.io/ungoogled-chromium-binaries/

Version

Version 151.0.7922.173

Have you tested that this is not an upstream issue or an issue with your configuration?

• I have tried reproducing this issue in Chrome and it could not be reproduced there
• I have tried reproducing this issue in vanilla Chromium and it could not be reproduced there
• I have tried reproducing this issue in ungoogled-chromium with a new and empty profile using --user-data-dir command line argument and it could not be reproduced there

Description

Embedded Patreon-Videos (not from external sources) don't load, I don't think it has to do with DRM. Right-clicking on the video and opening video link in a new tab plays it perfectly fine. Example: https://www.patreon.com/NightVenom/posts/nvphotorealism-168130332?utm_campaign=patron_engagement&utm_source=post_link&post_id=168130332&utm_id=93621f00-48c3-4c26-8795-0b548aa0f189&utm_medium=email

Edit: Could be reproduced in vanilla Chromium.

How to Reproduce?

1. Go to any Patreon creator
2. Check posts with embedded non-Youtube videos

Actual behaviour

Video screen is just black, no loading circle.

Expected behaviour

Video should play.

Relevant log output

Additional context

No response