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Almost as if your current browser is not "what you need to access Youtube"This is not just confusing. It's intentionally misleading and unethical.
And it doesn't just affect old people, or YouTube wouldn't have come up with it. Lots of young people grew up with computers and understand how to do what they want to do, but they never develop a systematic understanding of what they're using.
It gets worse, though. While we tech-folk know that all modern browsers are supposed to have near-parity, Google optimizes its sites for Chrome, leading to additional confusion for both knowledgeable and lay users.