Video-Codecs in Chromium missing

Question

I use a Version 81.0.4032.0 (Entwickler-Build) (64-Bit) Chromium Browser on my Windows 10 computer. On Facebook Videos and some Gifs are not running. So I opened the Console and found this logs:

Uncaught (in promise) DOMException: Failed to execute 'addSourceBuffer' on 'MediaSource': The type provided ('video/mp4; codecs="avc1.42C01E"') is unsupported.
Uncaught (in promise) DOMException: Failed to execute 'addSourceBuffer' on 'MediaSource': The type provided ('audio/mp4; codecs="mp4a.40.5"') is unsupported.

I have checked with this site: https://w3c-test.org/media-source/mediasource-is-type-supported.html and got 11 failed tests.

How can I add the missing codecs to chromium?

UPDATE list of failed tests:
Test invalid MIME format "audio/webm;aaacodecsbbb=opus"
Test valid WebM type "audio/webm;codecs=vorbis;test="6""
Test valid MP4 type "video/mp4;codecs="avc1.4d001e""
Test valid MP4 type "video/mp4;codecs="avc1.42001e""
Test valid MP4 type "audio/mp4;codecs="mp4a.40.2""
Test valid MP4 type "audio/mp4;codecs="mp4a.40.5""
Test valid MP4 type "audio/mp4;codecs="mp4a.67""
Test valid MP4 type "video/mp4;codecs="mp4a.40.2""
Test valid MP4 type "video/mp4;codecs="avc1.4d001e,mp4a.40.2""
Test valid MP4 type "video/mp4;codecs="mp4a.40.2 , avc1.4d001e ""
Test valid MP4 type "video/mp4;codecs="avc1.4d001e,mp4a.40.5""

Answer 1

By default, Chromium does not support proprietary codecs (like h.264, aac). Official info: https://www.chromium.org/audio-video

So, on macOS, you need to compile Chromium with the proprietary codecs support yourself ; or download pre-compiled versions with the proprietary codecs support (https://chromium.woolyss.com/ - I am the admin of this website for many years).