"țânțari"

[verylargehat]

I couldn't hear the final "i" and I only knew this was plural because that's the focus of this lesson.

Is this final vowel not usually pronounced?

[potestasity]

It's not a vowel. It's a mark of palatalization. Which means you pronounce a very short "i", without adding an extra syllable.

[J.C.M.H.]

The final "i" is heared in the ending -ii.

[MotherEffi]

In this regard, the final i is very much like the letter ь in Russian.

[AndreiChich]

Da!