Made me cry too. A father's love.
It reminds me of when my son was about 9 and in a swimming gala for his school. they had to swim one length breast stroke, one of crawl then one of freestyle. I should say that Richard was born with only one hand so swimming was not easy for him, especially breast stroke. By the time he's finished his first length, the winner was finishing his third. By the time he finished his second and was visibly tiring, the others were all out of the water. He realised that as he turned for his third length. His teacher went to the side of the pool and said, "Come on, Richard, you can do it." and he did. The cheer that went up was louder by far than the winner had. I have never been so proud as that moment.
I'm sure the father in the video felt the same.