UFO or hoax? Aerial video over South Korea stirs speculation

A new video has surfaced that some claim shows a saucer-shaped UFO zooming past the window of a passenger airplane flying over Seoul, South Korea. In the video, the unidentified passenger is filming the otherwise uneventful view from the plane's window. Suddenly he makes a startled sound as the white saucer-like image comes into view. Later in the video, the purported UFO image is magnified. Ultimately, it looks more like an ivory colored bowler hat than a piece of futuristic flying technology. Is this just bad computer-generated imagery (CGI) and a cheap hoax from a prankster or a genuine unidentified object caught on film? The same writer who speculates on the origin of this object also recently wrote about video taken from one of NASA's live video feeds. In that video, three objects in a triangle formation appear on screen about five minutes into the video. Someone from NASA chimes in to say the object is actually a piece of foil, aka space junk, and that its reflection is giving the appearance of three objects in a triangle formation.