The official description
AARO assesses that this video, whose uploader-defined title is, “AFSOC Kabul UAP Jul 2017,” is likely derived from an infrared sensor aboard a U.S. military platform operating within the United States Central Command area of responsibility. Video Duration: 00:00:17 Video Description: 00:00-00:13: No content. 00:14-00:15: An area of contrast moves into the sensor field-of-view from the left edge and moves to the right edge out of the field-of-view.
Quoted from the U.S. Department of War, PURSUE UAP releases. Read every file for this incident in Official files or at war.gov/UFO.