Ibrox yesterday as Rangers fans defied lockdown rules and flocked to the grounds.Thousands of supporters gathered outside the stadium on Saturday after Steven Gerrard's team beat St Mirren 3-0.Footage of rowdy fans was widely circulated on social media as they celebrated the win.One man appeared to be performing a sex act on himself as Ibrox could be seen in the background of one video.Cops are aware of the footage and have launched a probe.A Police Scotland spokesperson said: "We are aware of