"cameratrans" is a tag used in porn videos and refers to the term 'cum on camera transition'. This term specifically indicates scenes where one scene transitions into another with the first male character ejaculating onto the camera lens or nearby equipment. The semen then serves as a visual transition between two different sexual scenarios, often signifying a change in setting or participants. This can be a creative way to merge multiple scenes together without disrupting the narrative flow or causing confusion for viewers.