This porn video tag has two components: "sapphic" and "barefoot."
1. Sapphic refers to lesbian sexual content or relationships between women. It is derived from the name of the ancient Greek poet Sappho, who was known for her love affairs with other women. In a porn video context, it means that the content will feature two or more females engaging in sexual activities.
2. Barefoot refers to the fact that the individuals involved are not wearing any footwear during the sexual activity. This can be an important aspect of the scene for some people who find it sexually appealing or as a part of role-playing, such as sensual and intimate encounters.
So, the tag "sapphicbarefoot" would indicate a lesbian porn video featuring women without any footwear.