Unfortunately no analysis will be possible given the source material.
- No points of reference allowing for estimation of size, height and speed.
- Out of focus , partially blurry, single light in the night sky
What do we have ?
- Object didn't create sound ( Maybe it did but was too far away, since we have no point of reference we can not judge how far away it was, so no
sound is not a valid point )
- Object changed direction various times ( I accept that this should be clearly visible when watching it with your own eyes )
That's a tough one, my money is on ultra-light plane or a remote controlled device, but could as well have been something else.