Very large UFO captured while camera was unattended

This showed up in one of my captures, If I’m busy I sometimes set the camera in the backyard and leave it to record. I review the resulting videos when I have time. Usually there are numerous satellites, bats and meteors. This gem was found about 9 minutes into one of the videos. It was silent as you can hear by the background noise. I left the music out to show this. I’ts been cold and cloudy here in Melbourne lately so not much to show.