Janna is a term that could refer to different things in the context of porn videos. It might represent:
1. A performer's name - If "janna" is the name of an adult film actress, it would indicate scenes featuring this specific person.
2. A role or kink - In some cases, 'janna' could represent a specific sexual role or fetish that is being portrayed in the video. However, without further context, it's difficult to determine what this might be.
3. A language or culture - If 'janna' refers to a particular language or culture, it may indicate a themed video set in that location or featuring performers of that nationality.
For a more accurate description, please provide additional information about the context in which "janna" is used as a porn video tag.