I just copied the title.

Probably just the title directly from the link

As the others already said, it's like that in the YouTube title, but funnily enough, this actually ties back into this story.

You see, there's three ways of going about content moderation:

• Basically don't do it and tell advertisers to go fuck themselves.
• Completely overdo it with shitty word filters.
• Actually have enough moderators to make sensible decisions.

Companies being companies, the third option is, of course, not an option.

And so, you've got eX-Twitter trying to do the first option.
While, for example, Google and TikTok are firmly on the second option.

And that is why you cannot write "fuck" into the title of a YouTube video. Nor any other word that could in certain contexts be bad for advertisers.