Touching! Lots of hard work to make that film. But there is a natural affinity amongst animals. When we were sailing/or powering, our lab would hear dolphin minutes before we would see them. She would go sit on the bow and wait--and the dolphin would always come an play in our bow wave.
I had a dolphin think I was in danger when in a 10 foot dinghy, and kept pushing me away from the rocks.