Captured on September 2nd, 2024. The video is sped up 25 times. More about the ACS3 solar sail demonstration mission:
https://nanoavionics.com/news/rocket-lab-launched-a-nanoavionics-satellite-bus-carrying-nasas-solar-sail-system-aboard/
https://www.nasa.gov/smallspacecraft/what-is-acs3/