There isn't much to add that isn't included in the narration and video proper. Just seeing one of these giants in the ocean is breathtaking, but to actually have a close encounter and know that they understand that you're trying to help them, is a life-changing experience. This video took my breath away and brought tears of joy to my eyes.
If only humans were so giving and grateful. Nah! That's too much to ask.
Be sure to view the entire video as suggested at the link.