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Google admits it's making YouTube worse for ad block users
(www.theregister.com)
This is a most excellent place for technology news and articles.
You forgot to mention it's also coming to all Chromium based browsers (i.e. Chrome, Edge, Brave, etc) as well in the form of ManifestV3
Manifest V3 doesn't really have the real client side DRM. It just has the ad-blocker breaking API changes. The real DRM will be whatever comes of the abandoned Web Environment Integrity API. (It's not really abandoned just shifted over to only Android WebView.)
Couldn’t they fork Brave and have both a current and a ManifestV3 version?
Usually Brave already strips away invasive/unfavolrable stuff from Google before releasing. OTOH, browsers with inbuilt adblockers won't be affected by MV3, as the latter only applyes to extensions. Inbuilt adblockers are part of the browser itself and aren't constrained by whatever rule Google may want to put in place.