Plurality

Nothing special. Just add an s.

In British English, there is a difference between youth and youths.

3. Journalists often refer to young men as youths, especially when they are reporting that the young men have caused trouble.
...gangs of youths who broke windows and looted shops...

4. The youth are young people considered as a group.
He represents the opinions of the

You can use "the youth of today" the same way in American English.
But if you say "I saw two young people leaving the building" you can change "young people" to "youths."

There is a funny scene in a movie in wich a lawyer, who has a strong accent, calls them "yutes" instead of "youths" and the judge has no idea what he's saying.

BarbaraPAThere is a funny scene in a movie in wich a lawyer, who has a strong accent, calls them "yutes" instead of "youths" and the judge has no idea what he's saying.

The director was British, and he stopped shooting when he heard "yutes" because he didn't know what the actor was saying. That's how the scene got in the movie; it wasn't in the script. Or so I

If we're talking about the same movie, the judge reacts to it. So if that's the case, it was a great ad-lib scene.

They wrote it in for the judge because everybody on the set thought it was hilarious when the director said in real life "What's a yute?"