The video depicts a person coloring a drawing of a mermaid in a sketchbook. The mermaid has short blonde hair and is wearing a bikini top. The person uses a yellow marker to color the mermaid's hair, starting from the top and moving downwards. The video captures the coloring process in detail, showing the person's hand as they color the hair. The sketchbook is placed on a flat surface, and the person's hand is the only part of them that is visible in the video. The coloring is done with care and precision, and the yellow marker stands out against the white background of the sketchbook.