It’s an age-restricted video. YT seems to be doing that a lot more these days. I’m not playing, though it is hard to tell if it is to comply with new laws (esp. in UK) or merely an excuse to garner my personal data.
Insert ‘why not both’ gif.
Also, seeing as I am signed in and have had my Google account for at least 16 years, you’d think the geniuses (genipodes?) at Google would have come up with an algorithm for this.