I believe that they ruled you must be forced to click a Consent notice to be bound by those terms, and even then it is not enough. Read for details.
TOS is not a contract. It's them saying why they may choose to stop serving you.
Funny that. Almost as if by including a lot of "legal sounding words", normal people instinctively defer and back away because they don't understand it. Which is entirely intentional to make you think the rules go one way, when they in fact do not.
Since when? Do I need to click OK to agree to it before I can watch any videos? Do I need to do this each time I load up the website?
I don't think I've ever seen a TOS for YT (although I must admit I'm very good at not actively being and to remember actions that have become habitual).
https://www.youtube.com/t/terms
Edit: actually you're right they don't explicitly ask you to agree to the TOS, but the TOS contains this paragraph.
> If you do not understand the Agreement, or do not accept any part of it, then you may not use the Service
So I guess the agreement is implicit rather than explicit.