Unseen Hurricane Katrina footage

My dad (living in Austin, TX) organized a Katrina relief mission immediately following the storm. They were some of the first let into the area aside from the Red Cross. He documented a lot of their interactions with people they found seeking shelter at places without power, water, or food. Not only in New Orleans, but also the surrounding areas and in Mississippi. Our family had a camp in Mississippi that led him out there and documented the severe devastation that was often missed by the news because it was a lesser known area. With the 20th anniversary coming up I figure there may be some sort of revisiting documentary and I want to know what is the best way to find someone doing this and how we can get the footage out there.