Clear Daytime Footage of UFO Over Sweden

Video showing a vertical or even bell-shaped object moving slowly and ominously over a town in Sweden has been shared online by the witness, who wrote this about the sighting: "A strange flying object caught in the sky of Gothenburg.bHuge like a building, moving and changing in shape:"

This sighting is similar to a recent one in Houston. Could both the videos show the same  UFO?

What do you think this recent UFO footage shows? An alien spaceship? Or maybe something simpler, like a helicopter or plane carrying a banner.

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