The video discusses the best and worst cheeses for the keto diet. The best cheeses like cheddar, Gouda, blue cheese and goat cheese are high in fat and protein but low in carbs, making them suitable for the keto diet. Cottage cheese and processed cheeses should be avoided as they contain too many carbs or undesired ingredients. While some cheese varieties are better options than others, all cheeses can be consumed in moderation as part of a nutritionally balanced keto diet focused on limiting carbs to maintain ketosis.