UK's ony two polar bears meet for the first time

The video discusses the introduction of Walker, a young polar bear, to Mercedes, Britain's solitary polar bear. Initially, Walker shows interest in Mercedes, but she is indifferent. Their interaction involves roaring and showing teeth, which is a form of greeting. Observations suggest Walker is submissive, and they are expected to be friends. As Walker is not mature, they won't mate, but Mercedes will have a new adventure.

What new insight or understanding did you gain from this video?