Jewel Cave Explore

Jewel Cave Explore
As the official park film for Jewel Cave National Monument, this production showcases the beauty and mysteries of one of the longest caves in the world. Follow volunteer cave explorers into one of the last frontiers and witness some dramatic underground scenery. Learn about available tour options, recent bat research, and airflow studies; listen to the stories of past cavers. This movie shares the natural and cultural history of the "jewel" of the National Park Service.
The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, 
Generally, materials produced by federal agencies are in the public domain and may be reproduced without permission.
Copyright in U.S. Government Works
Mar 8, 2023 — U.S. government works are in the public domain (i.e., not protected by the U.S. Copyright Act). You can freely use them (in a copyright sense
https://www.nps.gov/jeca/learn/photosmultimedia/multimedia.htm