Marriage proposals are a complicated business in their own right but if you’re hoping to have the moment captured forever on video, that will only add an extra layer of complexity as one unfortunate woman found out after being asked to record her friend’s engagement. TikTok user Mary Dawson (@marydawsonl) has shared her embarrassing failure on the social media site and her video has since gone viral, earning over 29.2 million views. Woman ruins engagement video to record furry intruderThe jaw-dropping video begins as you’d expect, with Mary filming the loved-up couple as the boyfriend is about…