An NHS worker pleaded with Insulate Britain protesters today to let him pass their roadblock so he could get home to his sick child.
In the video, obtained by LBC, the man begs with the demonstrators on Vauxhall Bridge in London to let him pass.
The frustrated parent can be heard telling them how "wrong" they are for blocking off the bridge.
He says: "My child is sick. Now you are blocking the road that's not right. Don't block the road."
Two police officers can be seen watching the confrontation, but they just tell the man that nothing can be done.
He replies: "This is really wrong. This is really wrong. You have to think about people as well."
In the clip the man also says he is unwell, and asks the campaigners: "How do I get home?"
Insulate Britain were in London today to demonstrate against the imprisonment of nine protesters who blocked the M25.
They sat on two key bridges, Vauxhall and Lambeth, and stopped traffic passing between the north and south of the city.
Met Police shut down the bridges for five hours and diverted traffic - which they said was for the "safety of all".
The Met made 30 arrests under Public Order Act conditions, which were previously imposed on Lambeth bridge.
The bridge had been shut down to traffic for a number of hours on Saturday by the sit-in, which initially involved up to 250 people who had marched from the Royal Courts of Justice.
Referring to Public Order Act conditions imposed on the protest, the Metropolitan Police said: "Lambeth Bridge has now been reopened, 30 arrests were made for breach of S14 conditions."
The force also said that Vauxhall Cross, where some of the demonstrators had moved, had reopened.
Earlier, uniformed officers had stood on Lambeth Bridge as traffic was diverted, with the Metropolitan Police saying this was "for the safety of all".
The demonstrators made speeches, sang songs, ate lunch and chanted slogans.
Cheers had broken out earlier as campaigners told the crowd that the nine jailed Insulate Britain climate activists are "political prisoners" and will not be the last to be locked up.
The nine protesters were jailed this week for breaching an injunction designed to prevent the road blockades which have sparked anger among motorists and others affected by the protests.
Extinction Rebellion later said Saturday's sit-down protest was to break the injunction granted to National Highways, in solidarity with the at least 34 people who have broken these injunctions so far, including those who were jailed this week.
Gabriella Ditton, 27, an animator from Norwich, Norfolk, was among those who took part in the Saturday's demonstration. She said she has been arrested six times with Insulate Britain, including once for breaking the injunction.
She said: "I expect to go to prison at some point for at least six months because I am not going to be apologetic about this.
"I have known for a couple of years that the only thing that is going to serve us is civil resistance. I have faith in people coming together.
"Solutions to this crisis exist, we just need the political will to do it."
They were protesting the jailing of nine Insulate Britain members at the High Court on Wednesday to three and four month sentences.
