Statue of Liberty UFO or a blimp?

A UFO video on YouTube, which at first looks like a blimp hovering near the Statue of Liberty, raises more questions than answers as the unidentified flying object seems to speed up, morph and even split. Other objects zoom past without explanation. What are these things?

The video, posted by the UK's Arran Shaw and his mum, is filmed on an iPhone and taken from a laptop screen downloading the SoL EarthCam feed, so the resolution is less than optimal.

The video segment is listed as having been recorded in July but only recently reviewed. The commentary is crucial as the two remark excitedly about the find.