Strange flashing light

Time: 31Januari 2025, 22.00 Location: Stockholm, Sweden

Saw this flashing light in the sky outside of my window Stockholm Sweden. I don't know what it is it stood still for at least 20 mins then it turned red and disappeared. This was on januari 31 around 22.00 in the evening. There are alot of helicopters here and airplanes but I have never seen it flash like this. I would like to know what it could be. It is not from a tower or a building as It doesn't exist where the light is and I have never seen it I always look outside every night.

I don't live near any military place and I have never seen anything strange outside except this thing. I think it might be some kind of drone but the only ones I have seen are small drones. I also have a video of the red flashing but it's really hard to see because my camera would not want to focus on that part but I have it on my phone. I would like to know what it could be I don't really believe in aliens and ufos but I'm curious of what kind of light this could be. I have some theories myself such as military drone or maybe a Russian spy drone haha.