It can be hard to believe UFO sightings when they're reported and filmed by random people who live by themselves in the middle of nowhere. But when they're filmed by NASA, it's a whole different ball game. 

This black object was filmed by a camera aboard the International Space Station for 22 minutes before it moved above the camera's range. Allegedly the object was bus-sized.

The UFO bears a striking resemblance to the Black Knight Satellite, an object that some people believe is of extra-terrestrial origins, and has been orbiting Earth for thousands of years. Of course, all of this is just conjecture, but the object was interesting enough for ISS crew to film it for 22 minutes. 

"It appears to be going up because it's on a slightly different trajectory as it goes around the Earth," Aren commented. That makes sense, and points to the object being some sort of satellite or even space debris. 

"This is some old footage of a hatch cover that floated away," davidandcricket suggested. While that is a possibility, I was unable to find any version of this footage posted before this year. 

The ISS is obviously a state-of-the-art operation, and it's frustrating to see its cameras suffer from the standard dip in fidelity when filming UFOs. We'll chock this one up to a satellite.