Chilling new video from inside Pulse nightclub as disturbing details emerge about shooter; President Obama visits Orlando

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ORLANDO, FL - New video from inside the Pulse nightclub shooting shows a scary scene.

"He's looking at the exits..." a crying woman says, hiding in a crowded bathroom of wounded victims.

"Shhh!" another person tries to quiet her.

Survivors tell chilling tales about the shooter Omar Mateen.

"I ended up in the bathroom and when we were in the bathroom, the guy, the shooter just started saying 'everybody come out," shooting victim Miguel Leiva, who filmed part of his ordeal, shared. "'Everybody's gonna die,'" he said the killer warned.

Disturbing new details about Mateen keep coming, like how he took breaks during the deadly rampage to search "Pulse Orlando" and "Shooting" on Facebook and that he made posts of his own that said, "Now taste the Islamic State vengeance" and a final post: "In the next few days you will see attacks from the Islamic State in the USA."

Police say about 45 minutes into the shooting spree, the killer paused to make phone calls.

One official said Mateen texted his wife while holed up in a bathroom to see if she had seen the news, and she responded by saying she loved him.

He also hit up a friend to say 'goodbye' and called a local news station.

Local news producer Matthew Gentili said, "He started saying 'I did it for ISIS. I did it for the Islamic State.' And I didn't know what to say to him."

But police say Mateen  bluffed about details, too. Survivors overheard him telling cops that he had a female accomplice inside the club with a suicide vest "and also that he was wearing a bomb vest," survivor Orlando Torres recalled. "And also there was supposedly three snipers out there...and get ready for the cops if they came."

Investigators have determined that Mateen watched ISIS beheading videos two weeks before the attack, which may have inspired his evil act.

Meanwhile, President Obama and Vice-President Biden traveled to Orlando to meet survivors and victims' families.

The President also met with first responders and hospital workers, marking the fourth time in a year that he has visited a mass shooting site.

"As one of the doctors said," the President remarked. "'After the worst of humanity reared its ugly head, the best of humanity came roaring back.'"

As this investigation continues, officials say a federal prosecutor plans to present evidence to a grand jury to determine whether charges should be brought against Mateen's wife, Noor Salman, for her possible "knowledge" of the attack.