To be clear (and the video isn't), the parallax is observed and calculated mostly from the diameter of Earth's orbit, with observations made six months apart.

To be clear (and the video isn't), the parallax is observed and calculated mostly from the diameter of Earth's orbit, with observations made six months apart. Gaia's L2 orbit is a much smaller factor, on the order of 1M km compared to Earth's orbital diameter of 300M km.