Saw a lighted, cylindrical UAP, traversing the sky westward in a seemingly level, horizontal trajectory, while continually flipping.

We saw a round, tuna can-shaped object (a little deeper cylinder than my drawing) with white lights on its two parallel edges, that may have been at jet travel height, flipping over and over while traveling in the same direction it was flipping, in a completely level-looking horizontal trajectory, due east to due west. We had gone out to observe the ISS pass over and when the ISS was almost directly overhead, this thing almost crossed paths with it (although at a lower altitude), its trajectory almost perpendicular to the ISS. Not a satellite or drone. I immediately stopped watching the ISS. I was so awestruck I didn't have the presence of mind to film it with my iPhone until it was miles away, a tiny speck. But, I think I see it flipping in my zoomed-in edit. The original 25 second video became 20 seconds, beginning with10 seconds of nothing prefacing the UAP. As it was only a speck at that point, I did not watch it until it was out of sight. It was only after I zoomed in that I saw that its odd flipping motion was apparent even miles away.