The video shows a hand flipping through pages of handwritten notes in a notebook. The notes contain mathematical formulas and calculations. The first page contains the title "PRACTICAL THREE," followed by "Calculate the prior mean and posterior mean and variance." The second page contains the title "STATISTICAL THEORY ONE." The pages are lined notebook paper with handwritten notes in black ink. The hand belongs to a person with dark skin. The environment appears to be indoors, possibly a study or office space.