A video posted on TikTok has racked up more than 4.5 million views as it shows people how to find out who has tried to look at their partner’s Instagram page – but some viewers have branded it “toxic”A video posted on TikTok has racked up more than 4.5 million views as it shows people how to find out who has tried to look at their partner’s Instagram page – but some viewers have branded it “toxic”