"If I try to hide what I did, it doesn't make me look very good anyway," he said. "So I'd rather just be honest about what happened."
The whistleblowers say the company's senior on-site executive, Chris Sullivan, often organized and led the heavy drinking gatherings, with a loaded pistol tucked into his pants.
Smith says Sullivan pushed hard for everyone to join in the excessive drinking, and said those who would not were cowards. "He called us a bunch of pussies," said Smith.
The video shows Sullivan at a blazing bonfire in an outdoor patio of the operations center whose location was supposed to be covert because of the sensitivity of the mission.
"There was nothing covert with bringing all that added attention," said Melson, the former employee. "Afghanistan is not the time or the place to be carrying on like that."
Sullivan no longer works at Jorge Scientific, according to the company statement. He declined to speak with ABC News.
The whistleblowers say that the drunken and stoned security personnel would often throw live ammunition rounds and fire extinguishers into the flames and watch as they exploded, often sounding like a real bomb explosion.
"It wasn't every night," said Kenny Smith. "It was every other night."
The company's operations manual describes a "zero-tolerance for alcohol and drug use" and says all personnel must be on alert 24/7 for a possible terror attack.
"Anybody who uses alcohol or drugs around armed weapons is putting themselves and others in a tremendous amount of danger, said former Army vice-chief of staff General Peter Chiarelli, an ABC News consultant who oversaw contractors when he served in Iraq.
"All indications from what I've been able to read and see so far indicate somebody missed something," said General Chiarelli after viewing video clips and the whistleblower lawsuit in the Jorge Scientific case.
In a statement to ABC News, Colonel Tom Collins, a U.S. Army spokesperson for the International Security Assistance Force, said, "Clearly, behavior such as that described by ABC News is not indicative of the outstanding work that thousands of contractors and service members perform every day in Afghanistan."
Col. Collins said he could not comment substantively on the allegations because of the on-going criminal investigation.
As American troops continue to withdraw from Afghanistan, there are now more private contractors in the country than uniformed U.S. military personnel and the new video is certain to raise more questions about the role and oversight of private companies performing many of the same jobs that once were carried out only by the military.
"We are relying more and more on contractors in Afghanistan," said Danielle Brian of the Project on Government Oversight.
"It has got to be that there is more of a sense of oversight on the part of the military and the U.S. government to make sure these contractors are not actually undermining the diplomatic mission with their behavior," she said.
A Pentagon spokesman said the military was unaware of the video and the allegations in the lawsuit until contacted by ABC News last month.