What the uploader say:

This is a CLOSE UP of the UFO, caught from plane over Amsterdam, Netherlands on March, 17 2012.

This is the best quality I have. I zoomed in and overlayed a high contrast mask around the UFO frame by frame. Please watch this in High Definition.

There are so many FAQs about this video. First of all, I still don't know what it is. But I know this is not a fake. This is a real footage. I thought about a helicopter or just a weather baloon. But flight experts told me that's unlikely because of the short distance to the international Amsterdam Airport Schiphol. So you may ask the flight security for detailed information about this. They may have radar images.

Why didn't I zoom in or just follow that UFO while filming it? That's easy, because I first noticed the UFO one day later when I watched the video on my PC. That's the problem.

And sorry, there is no more video of the UFO before that sequence, because I started to film right after the captain has turned off the "fasten your seatbelt" sign. And here it is, just a few seconds of what ever! But so you can deal with an altitude of about 10.000 ft AGL near the Amsterdam Airport.

Okay, that's it! Thanks for watching!

Here's the video:

Original video below: