Lights in the sky, Bakel, Netherlands

I filmed this with my samsung galaxy so it's not a very good quality. Different lights flew by and it seemed like they were playing with the thunderclouds. At first I thought it was ball lightning, but so many at once (I did not count but I estimate that between 5 and 7)? At the end one of the lights also became larger and chnged into a star shape, but as you can see in the video, when I pointed my samsung at, it had already disappeared.