How to juice a pomegranate

Did you know that this is how a pomegranate is juiced in Tel Aviv? 

Fresh pomegranate juice at the Carmel Market in Tel Aviv. #shabbatshalom

A video posted by Brett Konner (@konnartist) on

Tbh... right now if I need pomegranate juice (like for these pomegranate-lemon bars), I use Pom juice (you know, the one in the snowman-like bottle). I've been meaning to steal my parent's potato ricer. You just plop the seeds, and then squeeze. 

But this looks so much better -- no de-seeding needed. To my eye, this just looks like a citrus juicer. I'm into it for the most part, but I feel like there would be hidden chambers of seeds/juice that you wouldn't be able to reach.