I'm a little behind on this one, it's been out for awhile, but incase you missed it like I did, check out Twinsters!
It's the real life, separated at birth story of two girls, adopted from Korea. One grew up in the US, the other in France. They would have lived their entire lives without knowing of the other one's existence except for a chance YouTube viewing. Crazy.
Twinsters is currently available to stream on Netflix.