This porn video tag "gay cam" refers to a specific type of gay adult content. The term "cam" is derived from the webcam, which is a device used to broadcast live footage over the internet. In this context, it means that the video features gay men performing sexual acts in real-time or pre-recorded footage captured using a webcam. The "gay" tag specifies the sexual orientation of the participants involved in the act. This type of content is typically aimed at an adult audience interested in male homosexuality and live streaming or recorded webcam performances.