It took me ages too. Someone off here posted a link from you tube!! Do a search! Basically its complete opposite to how they say Xxxx i put it in the crook of ur elbow and pull one side out first then the other Xxxx
If you look at where Holly has her fingers on her left hand (index and middle fingers), there is a "sweet spot" there that caves in when you press it- try it. And once you find it, press that spot, then pull the lid off in the opposing direction. It pops off even easier than the video!