The fourth video posted to social media by the Guthrie family is a direct appeal to the public and could indicate a shift in the investigation as a second purported ransom deadline approaches, experts tell CNN.

“Today” host Savannah Guthrie posted a video Monday, saying the family believes Nancy Guthrie is “still out there.”

Guthrie’s possible abductors are demanding $6 million by 5 p.m. today, CNN affiliate KGUN previously reported, citing a purported ransom note sent to the station. The note included a threat to Guthrie’s life if the deadline is not met, according to KGUN.

Rallying the eyes and ears of people across the country is one objective of the video, according to CNN’s Chief Law Enforcement and Intelligence Analyst, John Miller, regardless if the ransom demands are real or not.

“What she’s really saying is, ‘We need everybody in the game here,” Miller told CNN. “We don’t want everybody to stop looking.”

Meanwhile, the Guthrie family has likely not received a response to previous videos directly addressing possible captors amid purported ransom demands, according to CNN Senior Law Enforcement Analyst Andrew McCabe.

“This message does not sound like the message that you would expect to hear from a family that is currently negotiating the return of their loved one,” McCabe told CNN.

Also a possibility: Investigators may now believe the ransom demands are not legitimate, according to Frank Figliuzzi, former assistant director of the FBI Counterintelligence Division.