Strange Unknown Noise Recorded in Canadian Wilderness

Occurred on October 3, 2019 / Sioux Lookout, Ontario, Canada

Info from Licensor: "my grandson, wife and I were grouse hunting on October the 3rd, 45km Northeast of Sioux Lookout, Ontario around 630pm, when we heard unknown frightening screams, which lasted for 5 minutes. We captured 2 videos, both terrified us. We recorded the sound because it's nothing we've ever heard before. the end result was my video going viral."