This is a close-up image of skin with numerous blackheads.
Blackheads, medically known as open comedones, are a mild form of acne. They form when hair follicles become clogged with a combination of sebum (the skin's natural oil) and dead skin cells. The characteristic dark color isn't caused by trapped dirt, but by the oxidation of the clogged material when it's exposed to the air.
The image appears to be a screenshot from a video, as indicated by the play button icon. The presence of gloved hands suggests that a dermatological procedure, likely the extraction of the blackheads, is being performed.