The term "bear-latino" in the context of a porn video tag refers to a specific type of porn content. The word "bear" is often used to describe older, hairier men who are generally more muscular and have a larger body size. This term comes from the idea that they resemble bears in their physical appearance.
The word "latino," as you may already know, refers to someone of Latin American or Hispanic origin, meaning this content would feature performers with Latino heritage. So, when combined, "bear-latino" is describing a porn video featuring an older, hairier, and more muscular Latino man.