If you are making a documentary in Ammonite, you would want to visit the Shaligram Museum in Baglung. As some part of the Dhorpatan hunting reserve is in Baglung, you can go there and have a hunting scene.
You can film a 7-foot-tall traditional drum known as Nagara, or you can make a video on near-extinct Quinoa, which is a nutrient-rich plant that used to be a staple food amongst hilly people.