The reference appears to describe a specific video file related to a chemistry or medical experiment involving litmus paper (lakmus) and possibly medical findings.
Educational videos on TikTok often discuss related topics, such as the causes of green-colored amniotic fluid due to meconium. Lakmus Junaid 13 p.3.mp4
In a related medical context, videos often demonstrate the use of (kertas lakmus) to test the pH of amniotic fluid (air ketuban). For instance: The reference appears to describe a specific video