I believe Extension:Video could be a very valuable extension for Miraheze. While it may be in beta still, it is 1.35+ support, and provides useful functionality that the existing extensions like Extension:TimedMediaHandeler and Extension:YouTube do not.
Something to add videos from links. And make them work like normal files. I mainly just need it to work for YouTube. But the YouTube extensions dimensions don't seem to always work, timedmediahandeler needs to upload them, and I use the widget extension at the moment, but similar issue to YouTube one. Extension:Video is very convenient by adding Special:AddVideo and Special:NewVideos. It's exactly what I was looking for.
Extension:Video would almost certainly not pass security review. The extension documentation page has a big red warning banner on it that says not to use it in a production system, which Miraheze is. Additionally, the latest stable version is from 2017 and therefore out-of-date.
Been reviewing this extension, security wise for awhile but just realized I did not claim this task. I however do need to check on that beta notice on the extension page as it may be a blocker as mentioned above.