The video likely performed well due to its satisfying visual of a glossy finish being applied to a beautiful painting, combined with the trending audio. The aesthetic appeal and the ASMR-like quality of the brush strokes would have contributed to its watchability.
Summary
The video shows a close-up of a hand using a wide paintbrush to apply a glossy finish to a painting of a starry night sky with silhouetted pine trees. The brush strokes create a shimmering, wet effect on the canvas.