Country of orgin has little to do with genre.
And extra credits isn't exactly an expert on JRPG's. For one Western RPG's predate JRPG's by a good few years at least. Wizardy was released in Japan before Dragonquest was made, and the game lifted some elements from it. RPG development didn't diverge until after that point when the Dragonquest template became popular in Japan, and later real time combat system became big in the U.S. Even then there is no uniform style for RPG development in either hemisphere. The rest of the video is horseshit that has nothing to with how the rest of the world defines game genres. Grand Theft Auto and Elder Scroll may both scratch the explore a big world itech, but next to no one thinks they are the same genre.