Description of the issue: Web site requires Chrome/Firefox/Edge, indicating when accessing from Brave that: “need to update browser to the last version”.
Seems to be working here and I am on the exact same build of Brave you are. Is it a specific URL because I went to the URL you posted, and it seems to load just fine.
@brou yes, you did not need to accept the prompt as you show in the last screenshot. That just appeared because you did not have it enabled. In Brave’s settings it existed as it already was in the browser. They just allow it to be on or of. If you’re not familiar with Widevine, it is a digital rights management (DRM) which is used by many websites to prevent people from pirating their content. Having it enabled means you can’t screen record copyrighted videos and it has other similar protections.
The error message given in general can be misleading. Widevine is often just added by default these days, so the website was assuming either you’re using an unsupported or outdated web browser.