This 8 June 2015 video from the USA is called Live Chat with Osprey Expert Dr. Paul Spitzer.
From the Cornell Lab of Ornithology in the USA:
In the 1960s, Ospreys were one of the species hardest hit by DDT. At the time, birding legend Roger Tory Peterson urged a young Paul Spitzer to study the connection. Working in a Connecticut salt marsh he calls his “Osprey garden,” Spitzer has spent five decades learning about the ecological needs of these delightful—and thankfully, common again—raptors. Read the full story here.