Because of similarity I wanted to make a side-by-side comparison with a UFO from another video.
To all my knowledge of UFO background information UFO on the right makes perfect sense as UFO depicted in thousands of witness testimonials. I am almost 99.99% certain that ufo on the right is real UFO. Particularly because from the electrical RF engineering point of view: a closed sphere would make a Faraday's cage from whose inside no signal can either escape or enter. First, to overcome inability of EM signal to enter Faraday's cage ( here, metal sphere ) antennae must be on outside. And second, to be able to pick up remote control EM signal from any direction antennae must be at 90º to each other. So UFO on the right is scientifically correct design, which I doubt UFO pranksters would know much about.
About UFO on the left ( with a blue sky background ) I am not 100% sure. What bothers me a lot is that the reflection is way too sharp. It can easily be a ball bearing that is very close to camera. But I can't say anything without trying to actually make a photograph of a shiny metal sphere in a similar circumstances.
Here is a video from which UFO on the right comes from: