One of every pet owners' concerns is always their pet forgetting them when they go away for a long time. When you're a soldier, and the periods of time you spend away are very long, that fear gets amplified.
We're used to seeing videos of dogs immediately recognizing their soldier owners when they get back from serving that leave us melting from joy. But in this video, for a long terrifying second, our heart almost plummets when we realize that the dog doesn't immediately recognize the soldier, only to be overwhelmed by a palpable feeling of relief when it does recognize her.
It's a happy ending, and our hearts did indeed melt. The lesson learned from this video has been summed up perfectly by this one youtube commenter: "May take a min, but a best friend will never forget."