Priyanka Jethalal Maru went to the 18th floor of an under-construction building in Sewri area yesterday morning. She had planned to jump off the building and was seen shooting her video, police said.
After a resident of a nearby building called the control room, a police team reached the spot and persuaded her not to take the extreme step.
Inspector Shalini Sharma, who is trained in handling such situations, was instrumental in dissuading Maru.
Last month, a 23-year-old college student ended his life by jumping from 19th floor window of a hotel in suburban Bandra after streaming his final moments live on Facebook.