What is a Back Buzz on a Guitar?

In this short video I explain what a back buzz is and how to properly fix it.
There are other temporary ways to fix it, but I don't find them very effective or useful so will stick to the right way of addressing it.
Hope you find it useful.

[@thisriver]

Thanks Pancho, I love the "Cartel de Micro" on the background, nice little chilean touch for those who know.

[@doctor7music91]

Hahaha, yep! A gift from my sister on my latest trip. Un abrazo!