Learn French: Vous êtes très contents.

In French, the s at the end of vous is normally silent. But because the next word (êtes) starts with a vowel, the s connects to it and makes a "z" sound. This linking is called a liaison.

Vous can mean a formal "you" (one person) or a plural "you" (multiple people). How do we know which one it is here?

We know it refers to multiple people (like "you guys" or "you all") because the adjective contents has an s at the end. If this were addressed to just one person formally, it would be written as Vous êtes très content without the s.

Why does contents have an s at the end?

In French, adjectives must match the subject they describe. Since the pronoun vous refers to more than one person in this sentence, we add an s to content to make it plural.

Do I pronounce the s at the end of très and contents?

No, the final s on both très and contents is completely silent. Final consonants in French are usually silent unless they link to a following vowel.