If rolled out widely, this would make web browsers and third-party YouTube clients without a DRM license unusable for YouTube playback, download, etc. This would include almost all open-source web browsers and almost all third-party YouTube clients. Archive link to reddit post about this
I pay for Premium and if they actually do this I’ll stop my subscription. Web DRM is stupid and I hate that other Streaming Services already have it. Apart from being another resource sink in browsers, it’ll stop third party clients which I use and it also turns off Nvidia Shadowplay which is annoying as it doesn’t automatically turn back on once the DRM content is no longer loaded.