Shapeshifting UFO in New Hampshire

One sunny weekend in July of 2025 I was standing at the checkout line at the garden center at a Lowes in Southern, NH when I noticed an object that looked like a small cloud floating slowly over the tree line in the distance. I took my sunglasses off to see if I could see it more clearly and it vanished! I put the sunglasses back on and I could see it again! I took them off and again, it was gone. I have never experienced anything like this before so I quickly left my place in line and began filming this cloaked object with my cell phone.
Does anyone have any idea what I witnessed? After watching this video let me know if you have any ideas as to what this flying object could have been.