In the video prominent independence campaigner Lorna Taylor shouts at a Conservative candidate’s team including taunts of “You’re not welcome in Scotland.”
Police have now launched a probe into “anti-social behaviour” and appealed for information.
But the scenes which unfolded in Cowie, Stirlingshire, on Thursday night were branded “unacceptable” and sparked calls for the First Minister to take action.
Nicola Sturgeon was challenged over the 'threats' made by SNP activist Lorna Taylor to Tories
Tory Stephen Kerr, who is hoping to unseat the SNP’s Steven Paterson in Stirling, said his canvassers “routinely” faced such abuse.
The four minute video shared on social media begins with Mrs Taylor, 52, behind the wheel of a van announcing she’s “going live ‘cause I’ve got the Tories”.
In the video the independence campaigner shouts at a Conservative candidate’s team
Mrs Taylor is heard to say: “Get out of Cowie, get out of Bannockburn, get out of Scotland – you’re not welcome.”
Get out of Cowie, get out of Bannockburn, get out of Scotland – you’re not welcome
She and another woman only identified as Mary follow the Tory team around the former mining village’s streets as Gerry Cinnamon’s anti-Westminster anthem Hope Over Fear plays in the background.
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Attacking Conservative policies Mrs Taylor shouts: “Run away, get out this is Tory-free Bannockburn.
“Tories are not welcome – now move. Every time you come up on the street you will [SIC] be coming after.”
She hurled abuse including taunts of 'You’re not welcome in Scotland'
The video ends with the former cleaner and sales assistant saying: “If there’s anybody else in Cowie that’s free to lend a hand with the Tories feel free.”
Mrs Taylor is co-organiser of the Freedom Convoy which took part in a rally outside BBC Scotland’s Glasgow headquarters ahead of the 2014 referendum in protest at perceived pro-Union bias.
She has been pictured with both Ms Sturgeon and her predecessor Alex Salmond. She is also Facebook friends with two SNP Stirling councillors, including Alasdair MacPherson.
Mr MacPherson was suspended as a councillor for five months in 2014 over behaviour considered aggressive and intimidating.
In a Facebook post now since deleted he appeared to endorse Mrs Taylor’s pursuit.
Nicola Sturgeon's comical moments on the campaign trail Mon, May 22, 2017 PA 1 of 13
SNP leader Nicola Sturgeon stops for an ice cream after making an election campaign visit to Scottish Gas HQ in Granton, Edinburgh
Mr MacPherson wrote: “I hear that the toxic Tory candidate was canvassing in Cowie tonight – only to be confronted by several local residents who reminded him in no uncertain terms of the damage Thatcher and his poisonous party had inflicted in our mining villages.
“I understand he and his troops left shame faced. Well done #toryfreecowie.”
But the video provoked a backlash on Twitter with some users hitting out at “intimidation by yestapo thugs”.
Scottish Tory deputy leader Jackson Carlaw said: “It doesn’t matter the colour of the rosette, activists are the lifeblood of our democracy.
“This person isn’t representative of them. Volunteers should be allowed to make their case without threats or abuse.”
It comes just days after SNP candidate Joanna Cherry was accused of a botched smear on a nurse who criticised Nicola Sturgeon on TV.
The QC was forced to apologise this week after she briefed the media with false allegations about Claire Austin.
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Police have now launched a probe into 'anti-social behaviour' and appealed for information
Miles Briggs, the Scottish Tory candidate for Edinburgh South West, said: “Nicola Sturgeon and the SNP cannot simply ignore or try to wash their hands of the unacceptable actions of her former MPs and party members.”
A Police Scotland spokeswoman appealed for information and said: “Police in Forth Valley are investigating following a report of anti-social behaviour in the Cowie area.
“The incident was reported to police on Friday May 26. Inquiries are currently ongoing.”
An SNP spokesman said: “She has been spoken to and reminded that political arguments should be made with courtesy and respect.”
A woman answering Mrs Taylor’s phone yesterday [FRI] said the activist was not available for comment.
But when allegations of harassment were put to her she replied: “She doesn’t have nothing to say anyway. Ah, tell them to go b***** off. Goodbye.”