Most close up video of the sun, shot from the European Space Agency (ESA)'s Solar Orbiter. Solar Orbiter is a spacecraft that orbits in a highly elliptical orbit around the sun, bringing it out by us, out by Earth, on the outer part of its orbit, and inside the orbit of Mercury very close to the sun on the inner part of its orbit. This video was shot in ultraviolet on its last whipping through the inner part of the orbit a few months ago, but the video was only recently released.
It shows in the transition between the sun's atmosphere to corona there are formations called "coronal moss" that form delicate, lace-like patterns (that's how they describe them -- look like sharp small wiggles in the image to me), "spicules", which are "spires of gas" reaching upward, and "coronal rain", which is made of higher-density, lower-temperature plasma that falls back down on the sun.
The "coronal moss" are thought to be at the base of magnetic field loops that are otherwise invisible.
The video also caught a "small" eruption that is bigger than Earth. "Small" in comparison with the sun, though.
The Sun's fluffy corona in exquisite detail - ESA