Weirdly rotating disk object flying through sky.

I got out of my girlfriends mums car along with her and was about to go enter my home when I saw 4 disk shaped objects moving through the sky in a bizarre way. The video lasts 11 seconds and I managed to record a single disk object moving strangely through the sky. There were 4 all together but the on video only 1 was captured on video. It is quite far so no sound was heard. We thought it way be a paraglider or some sort of other aircraft but the way it moved disproved any of these ideas. After the video ended I spent another short while looking at it and turned away for a few short seconds. When I looked back all the objects were gone without a trace. I have been thinking about this for a long time and finally decided to submit it to specialists. Please may I get some answers