Meh, there are being tons of UFO sightings all over the world. UFO's are simply things people see in the sky and can't directly identify (that's why they're called this way). Of course a lot of people immediatly assume these things are something far fetched like an alien spaceship that looks exactly like those used in 1950's science fiction movies, but I don't see how it makes sense that if you can't directly explain something it has to be something extremely unlikely and implausible while there are plenty of more reasonable explainations.
EDIT: After watching the video, I must say this does look pretty spectacular and this isn't a regular UFO sighting. My first idea is that it's a very smokey airplane something's horribly wrong with. Let's hope that's not the case.