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
Youtubers have complained about YT being a horrible landlord for so many years, and yet they can’t leave. They keep trying, but very few succeeded. It’s a shitty situation, but that’s where the audience and the money are.