The video shows a person using a tool to apply a substance to a knife. The knife has a black handle and a silver blade. The person applies the substance to the blade and then uses a tool to spread it evenly across the surface. The substance appears to be a liquid, possibly oil or lubricant, which is commonly used to maintain the sharpness and prevent rust on knives. The person's hands are visible in the video, but their face is not shown. The background is a dark surface, possibly a table or countertop.