Thoughts on this object? Can’t tell if it’s a plane.

Thoughts on this object? Can’t tell if it’s a plane.
Time: 01/18/2025 4:08 PM
Location: Northern Arizona/ Southern Utah 

I saw this the other day on a flight from CA to Salt Lake City Utah. We were over Northern Arizona/South Utah I believe while I took this. I was just looking out the window and I saw this black object pretty close to us and I was confused why we would be flying so close to another plane in such a remote area. It was all black. I couldn’t see wings on it when I first noticed it and after looking at it for a few seconds I decided to take a video. It was not much lower than our plane was it almost seemed like it was the same level at one point. It could just be a private plane or a helicopter but I was just confused why a helicopter would be as high as a commercial plane and why a small private jet would be so close in such a remote area. What do u think ?