South Korean UFO Sighting

A new video has surfaced that seems to show 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.

I'm usually in support of crazy UFO conspiracies, but this one just doesn't hit me the same way. Why was the cameraman randomly filming out the window? When the video is enhanced to zoom in for more detail it seems more fake. Not sure if it's just CGI or some new viral marketing thing, but it still doesn't strike me as legit.

What do you think?