As the sun was getting lower in the West the young male is working hard, making trip after trip to bring more nest materials. She sat quietly and watched.
Then he brought in this bunch of soft material, probably grass. Ospreys will line their nests with soft things just before it’s time for the eggs to be laid.
Since that is obviously not what’s happening here – they’re both too young – apparently he just wants to show her that he does know what to do … when the big event occurs.