Microsoft started testing a new Microsoft Edge browser based on Chromium some time ago. The company has released new canary and dev is building for the browser over the last few weeks, and previving is actually really good. In fact, I've been using the new Microsoft Edge Canary on my main Windows machine and my MacBook Pro for more than a month, and that's great.
But if you see YouTube a lot, you'll face a new problem on the new edge. It turns out that Google has randomly disabled the modern YouTube experience for users of the new Microsoft Edge. Users are now redirected to the old YouTube experience that lacks modern design as well as the dark theme of YouTube, the first spotted by Gustave Monce . And when you try to access the new YouTube manually from youtube.com/new, YouTube just asks users to download Google Chrome, saying the Edge browser is not supported. Ironically, the same page says "We support the latest versions of Chrome, Firefox, Opera, Safari and Edge."
The change affects the latest versions of Microsoft Edge Canary and Dev channels. It is worth noting that the classic Microsoft Edge based on EdgeHTML continues to work fine with the modern YouTube experience.
The strange thing here is that Microsoft has worked closely with Google engineers on the new edge and chrome. Both the company's engineers work closely to improve Chromium and introduce new features such as ARM64 support for Chromium. So, it's very strange that Google prevents users of the new Microsoft Edge browser from using the modern YouTube experience. This is probably a bug on the Google site, but it could also be intentional – we don't know it at the moment.
Marked with Chrome, Google, Microsoft Edge, Microsoft Edge Preview, YouTube