Was low in the sky, but passed me overhead

It was hovering still in sky at a far distance but low in the sky, it had bright white lights, and then red and white lights, it moved around at the speed of light and was silent, but before it passed me overhead there was a noisy engine noise, I was filming on my phone, but when it passed me overhead the light was so bright I had to look down and stopped filming.
I am working in the Cardiff Bay which is just before the sea, I recently saw 2 other UFO but the night was brighter in July, they were round and glowing and still, I also saw low in the sky just going into a cloud at a slow speed an egg or tic tac grey metal colour with black legs underneath, UFO in August
I tried to download a video frame on this page below but the submit button wouldn't work so I have deleted it.