I have done a little search on that photo and it seems that it is real.
Inosculation:
The phenomenon begins when two branches that grow separately begin to approach each other until they touch each other. At that moment, and due to the movement caused by the wind, the bark begins to wear and the cambium (the layer of tissue found under the bark) of each branch comes into contact, beginning the fusion or autograft process, since They grow together as the branches increase in diameter.