If the "13" refers to the age group or rating, common "proper features" for media aimed at 13-year-olds often include themes of:

If you are looking for information on a specific video, here are the most common contexts for a title like that: Technical Context (mp4 file)

According to WebMD , girls often start taking an interest in dating around age 12.5, though individual readiness varies. Perspective on Teenage Relationships

“I am a 13 year old girl So this should work. Be nice... complement her but not in a flirty way.” Quora