Flying low there's two spheres one on top of the other. They go sideways and upwards towards the sky. In the end they take off quickly

I'm not sure if this is an actual UFO, and I anyone who knows what this is to let me know in the comments. At first I thought it was a helicopter carrying cargo, which would be a rare sight around here. I then realized that was no helicopter, and it was definitely not an airplane of any kind. By the end I completely lost sight of it, but I kept recording with zoom trying to see if I could find it again as it was almost impossible to do so with the naked eye at this point, but I could not find it and gave up. Later that same day I was checking the last video I took (the one where I couldn't find it, and I realized that for a fraction of a second you can see it very quickly go left, and then right in a spiral motion right before disappearing. Thank God I have the building wall to the right in the shot to prove it was not due to a camera shake. The most logical explanation would have been a balloon, and I genuinely thought it was until I realized how it takes off at the end. I cut that last part and added various versions of it by the end, zoomed in, slow motion, black and white, and color corrected. Any other logical theories are much appreciated.