In the clip, the 18-year-old, dressed in a white jumper, can be seen sprinting down a pair of escalators, moments before a police officer is filmed in pursuit of the alleged knifeman.
After being hauled in by officers at the turmoil-hit shopping centre in Nordstan, in Gothenburg, the teenager was charged with attempted murder.
The centre has been hard-pressed to cope with a surge in violent incidents and crimes as it is being overrun by migrant youth gangs who have been accused of various acts of anti-social behaviour.
The fight is said to have occurred after the victim allegedly confronted the alleged assailant over stolen money.
The teenager tried running off after allegedly stabbing another youth
Speaking to the police, the charged youth said he pulled out the knife because he wanted to scare off the other male.
Following a short confrontation, the victim fled to a nearby harbour, where he was then allegedly struck with two iron bars.
Footage of the police chasing down the suspected knifeman comes as Gothenburg police earlier this month said they had been forced to implement extraordinary measures to cope with the increased number of incidents.
Nordstan is Sweden’s largest shopping centre in terms of sales and number of visitors, however once the shops close at 8pm, criminal gangs have loitered around the shopping facility.
If there are conflicts from their home countries, they bring them here
Jonas Bergqvist, one of the team managers of the city police, told Expressen: “We have seen an increase since last autumn, with mostly unaccompanied minors who are staying here in Nordstan.
“In the evening they deal drugs and violence between fractions sometimes occur. If there are conflicts from their home countries, they bring them here.”
After police admitted the shopping centre was struggling to maintain control, women working at Nordstan also came forward and said they were living in constant fear of verbal assaults and sex attacks.
One 24-year-old female worker said she was being constantly harrassed.
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Rikard Sorensen, one of the team managers of the city police, condemned the situation
Describing how the youth gangs who descend on the stores during the evenings are difficult to handle, Emma told Expressen: "It's sexual harassment.
"I'm told they would like to do both this and that with me. They say I'm attractive, ask me when I'm off work."
The 24-year-old said she was considering quitting her job because of the thugs.
"I love my job and the people I work with. But no one should have to feel unsafe at work," she said.
Police spokeswoman Ulla Brehm said women working in the stores at Nordstan were particularly exposed to the thuggish behaviour because they cannot walk away from the terrifying situations.
Rikard Sorensen, one of the team managers of the city police, condemned the situation as he made a clear dig at the liberal country’s immigration policy, as many of the foreign youths wreaking havoc lacked identification papers.
“I've had people in front of me that look like they are 35, but who claim to be 15. I can’t prove they’re lying so we have to release them,” Mr Sorensen said.
The admission that Nordstan has become a lawless hotspot comes as Swedish police last year issued a report where it detailed incidents from more than 55 areas which it branded as “no-go zones”.