A cylinder shoots into view along with a sphere; contracts into a "barrel"; the "barrel" departed on the same path the cylinder entered

In the images, the small sphere to the left is a star, possibly Vega. A small white object appears moving upwards (it may be a bug near the camera, I don’t know) and a sphere also rises from the bottom of the screen toward the right. Then a cylinder either shoots up, or lengthens upwards from a shorter “barrel” form. The bug continues upward, the sphere begins to sink, and the cylinder lengthens. The cylinder suddenly begins to separate and contract, but it appears to contract into the barrel shape; the barrel then abruptly exits along the same path and direction from which the cylinder emerged. The sphere rises and exits the screen to the left. It was quick.