A bright light in the sky from some kind of craft and it’s movement and speeds were erratic.

I saw a bright light from some kind of craft in the sky and it looked odd to me. I questioned whether it could’ve been a plane or not and decided to take out my phone to record it just incase it was a UFO. I only watched the craft with my naked eyes for maybe three seconds or so. After that I was just watching it through my phone screen because I wanted to capture it all on video.
Upon starting the video you can see the object is moving straight but then it starts to move in ways that planes and helicopters are not capable of. Its speed and movements were very erratic. Then some trees had got in the way and so I kept the video recording while I walked away a little bit so I could get more video footage of it.
Once I spotted the craft again it was very far away. I aimed my camera back at the craft and you can see the light(s) from the craft flashing. It was alternating between a dull light and a bright light.