Product review (5 stars): For all your Samsung fridge flap needs!
Exactly what we needed for our fridge! The other spring model (the one in the video and more widely available) is shorter and bent differently.

The piece of the spring that is inside the flap is the shorter end, on the bottom third, easy to see where it goes.  The longer end goes into the opening and the end of the spring goes into the small hole on the fridge door where the flap hinge connects.  Easiest to do if you pop the flap open with a thin flathead screwdriver / pry bar while flap is still attached, as the spring is hard to line up while trying to also line up /reattach the flap to the door.