The official description
AARO assesses that this video, whose uploader-defined title is, “Spherical UAP pulsing over water [CALLSIGN],” is likely derived from an infrared sensor aboard a U.S. military platform. Video Duration: 00:03:32 Video Description: This media was digitally altered prior to its upload to a classified network, and is presented as received. 00:01-0:47: The video features an area of contrast generally within the center of the frame. 00:48-00:52: The sensor briefly switches contrast modes, with the area of contrast remaining generally within the center of the frame. 00:53-03:32: The sensor returns to its original contrast mode, with the area of contrast remaining generally within the center of the frame.
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.