One UFO zipped by in the sky and was captured by NASA. But a hand quickly came to hide the evidence. Watch the video below. Can you see that a hand is trying to hide evidence of the UFO flying about in the sky? 

One alien seeker, Tyler Glockner of Secureteam10, is clear that it is the video of an astronaut, who is moving his hand 'deliberately' in front of a camera at the International Space Station (ISS). He is convinced that there is "something fishy" that is going on.

When you tune into the video below, you can hear Glocker saying that there is a lighted spot in the sky, which he claims is a UFO in the window. The astronaut then tries to hide the blip with his gloved hand, according to metro.

One poster on the website said: "These are some incredible clips, I've never seen any of them. How could anyone possibly debunk these?"

Another conspiracy theorist wrote: "I bet aliens are actually truthful to their people that we "aliens do exist" while our government lies to us." 

But many sceptics point out that it is perhaps just an ordinary video of an astronaut at the ISS, moving his hand about. There are a number of other doubters who are pretty convinced, and explain that these sightings happen regularly when the lens gets distorted. It is not just alien craft that gets parked in the ISS. 

Nigel Watson, author of the UFO Investigations Manual says: "The constant 'sightings' of UFOs near the ISS are mainly due to reflections and space junk, and it is down to wishful thinking that images sent back from the space station are of alien craft. The same applies to the enormous amount of alien artefacts and structures seen in images, sent back from Mars."