What's the difference between "chan," "kun," and "sama?" like in a lot of video I watch I see (name-san) or (name-chan) or (name-sama) and don't know what it means?

Sama is very formal and would be used for god, royalty, or possibly extremely high-status people. San is a generic formal honorific, used for coworkers and bosses. Chan is an informal and endearing honorific, female. ... Kun is "chan" but for males.

chan is more for girls, kun is more for boys, idk about sama