I had seen quite similar phenomenon. Two star-like objects were going in parallel directions with no sound and quite fast (much faster then it’s shown in the video). Then they both started to approach each other still going according to their general course. And at the moment of their impact (or combine or fusion) they just disappeared. It took about 5 – 10 seconds.
This is the closest thing I have found to what my father and I I saw on December 18TH 2015 IN South Australia. It was forming into one then seperating just like in the video and when I first spotted it in the sky itvwas like a huge glowing helium balloon with a long tail. I watched it for around twenty minutes going back and forth and dividing into two then forming into one again it appeared to me like it was searching dor something. Just before it took off a huge red light appeared and it seemed to start spinning. I did manage to get a photo as well
This is very close to what my father and I saw on December 18th 2015. When I first seen it, it looked like a big bright glowing helium balloon with a long glowing tail. It was going back and forth in the sky dividing into two then forming itself back into one the entire time in which I watched for around 20 minutes. Just before it took off a huge red light appeared on it and the object looked as though it was starting to spin. The way it was going back and forth in the sky looked as though it seemed to be searching for something. I also got a photo of it