White object flying high in the sky, shifting its traveling direction.My name is ((name deleted)) and I'm a teacher in a private school.In addition to this report, I sent a piece of footage of the object. The total footage time is about 20 secs, but I shortened the film so it could be sent via e-mail. The important parts are included, though.This object was spotted when I was filming dust particles near the sun from my third floor balcony - the sun light reflects off and amplifies flying particles in the atmosphere, when looked from a certain vantage point. However, this object behaved unusual in the sense that it didn’t follow the air currents. All particles in the air fly either in the same direction of the wind, or erratically when there are gusty winds. This one seemed to have a mind of its own.The object was traveling northeast, then it stopped and came back again, disappearing overhead on top of the building. It was difficult to determine its altitude, but I estimate it to have been at least 6000 feet.Short after I began filming, I used 20X zoom, which unfortunately made the footage very shaky. However, the object was actually traveling in a straight line, even though it doesn’t look so in the film. I had my other eye opened and could see it traveling in a straight line.