Activists who oppose President-elect Donald Trump were caught on camera in an undercover video discussing ways to disrupt a gala celebrating his inauguration, including the use of butyric acid, better known as stink bombs.

An edited video, shot by James O'Keefe's Project Veritas, a conservative group known for conducting sting operations on liberals, that was released Monday shows three members of the D.C. Anti-Fascist Coalition brainstorming ways to shut down the inauguration eve DeploraBall in Washington, D.C.

'Yeah, if you had a pint of butyric acid, I don't care how big the building is, it's closing,' an anti-Trump activist, identified as Luke Kuhn in the video, says in the opening clip.

Activists who oppose President-elect Donald Trump were caught on camera in an undercover video discussing ways to disrupt a gala celebrating his inauguration, including the use of butyric acid, better known as stick bombs

An edited video, shot by James O'Keefe's Project Veritas , a conservative group known for conducting sting operations on liberals, that was released Monday shows three members of the D.C. Anti-Fascist Coalition brainstorming ways to shut down the inauguration eve DeploraBall in Washington, D.C.

The O'Keefe video is an expose on '#DisruptJ20,' a coalition that has already confirmed its plans to disrupt Trump's inauguration, which an estimated 800,000 to 900,000 people are planning to attend

The O'Keefe video is an expose on '#DisruptJ20,' a coalition that has already confirmed to Fox News that it plans to disrupt Trump's inauguration, which an estimated 800,000 to 900,000 people are planning to attend, beginning with a Wednesday dance party at the vice president-elect's D.C.-area home.

A female member of the group was heard in audio last week that was shared with FoxNews.com saying that the coalition will 'do everything we can to try and stop people from being able to access the inauguration' - including 'blockades' of checkpoints into the security zones and public transportation access points.

One organizer told Fox that the group wants to 'turn the inauguration into as big of a clusterf***as possible.'

In the tape that appeared on Fox and in the video shared by Project Veritas, the group talks about its plans to 'crash' the inauguration eve DeploraBall, a pro-Trump event that will be held at Washington, D.C.'s National Press Club, not too far from the White House and National Mall.

'It would be really interesting if we could stop them from having the DeploraBall at all,' an unidentified planner of the chaos is seen saying in the Project Veritas tape.

One member of the coalition that appears in the Project Veritas video and was identified by the investigative group as Scott Green is heard saying that the stink bomb acid is 'very efficient' and 'very smelly' and 'lasts a long time.'

Green said he was looking for a way to 'ruin their evening, ruin their outfits or otherwise make it impossible to continue with their plans. Make sure they get nothing accomplished,' Green says in the video, shot last month.

A third man, who Project Veritas identified as Collin Dunn, says, 'If you get it into the HVAC system it will get into the whole building.'

Dunn also says he's 'trying to think through how to get all the sprinklers to go off at once' as a back up. 'And the added benefit, everybody is going to walk outside in the freezing cold,' he observes in the chopped-up scene.

Kuhn says at one point in the edited tape: 'The message has to be, we do not recognize the city government either. If you try to close us down we will look for your house, we will burn it. We will physically fight the police if they try to steal one of our places. We will go to war and you will lose.'

The Project Veritas videos are always heavily edited and its unclear based on the cut released by O'Keefe if the stink bombs were the D.C. Anti-Fascist Coalition's idea or they were set-up and egged on for the video, as other victims of Keefe's sting operations have contended in the past.

They are clearly seen and overheard discussing the stink bombs, and how to best set them and the sprinkler systems off, though.

O'Keefe says members of his operation met with the FBI, Secret Service and DC Metro Police before publishing the video to warn them about the nefarious activity that was afoot.

The group hosting DeploraBall has meanwhile announced additional security measures for the sold-out event since receiving threats, according to conservative blogger Jim Hoft of The Gateway Pundit.

'We’ve hired a professional security team to work the event. We did this through the National Press Club, which is experienced with high-security events,' a Sunday statement said.

The group said it chose the Press Club for the event 'partly because we knew it would be within the security perimeter. This means there will be an expanded police presence in the immediate area.'

Organizers advised attendees in the statement not to engage with protesters they may come across outside 'in any way.'

'Take the high road. Do what you need to keep you and yours safe, but otherwise ignore them.'

The US Capitol looms over a stage during a rehearsal on Sunday of President-elect Donald Trump's swearing-in ceremony in Washington. Activists opposed to the president-elect say they plan to set up blocakdes to make it difficult for his fans to attend his inauguration

Trump ally Roger Stone is one of the confirmed attendees of the gala.

He said in a December discussion about the event on InfoWars that he had an operative in a DisruptJ20 planning session that anti-Trump activists plan to 'harass' Secret Service and inauguration attendees.

'They are going to have roller derby women zooming through the crowd knocking people over and disturbing order,' Stone said, describing their plans as 'an effort to paralyze the city.'

Stone said in the broadcast that 'drones loaded with rockets to attack the parade' on Inauguration Day were also under consideration.

'Secret Service take notice -- Happy to share this with anyone from the service who takes notice,' he said.