Videos of apparent vigilante beatings in Invercargill are being investigated by police for links to two serious dating app assaults.  The twin late night assaults in the city's Queens Park at the weekend left one victim in critical care and the other in a serious condition.  Mayor ‘horrified’ over Invercargill attacks Police have confirmed they are investigating links between the assaults and a compilation video posted to social media which has a caption claiming it is a group of young men "exposing predators" in Invercargill.  The video has three separate clips with groups of youths surrounding and/or chasing a person.  The first clip, which appears to be filmed at night in Queens Park, shows a youth running after a young male and then pinning them to the ground.  The pursuer then asks whether the male had come to the park to meet a 15-year-old.  The second shows a trio of youths chasing someone who escapes into their ute.…