I saw this on a news website and am not sure how I feel about this. I viewed the video with Kian, who laughed a little, but also said when she was saying naughty things and making messes.
Taking videos/making videos with your kids? Cute. Entertaining. Fun. Etc. etc. etc. and so on. However, it's apparent they made this for the Internet (spent 20 hours editing it!) and not just for fun. These are the kinds of words and the language I am teaching my son not to use. Even if it's just for the video, it seeps into the rest of your daily talk and it's rude and disrespectful for a child to speak that way to an adult. (Never mind she has some speech issues, intelligibility and talking with clenched teeth.) It's obvious there was a lot of coaching on what to say as well, which for me, takes away from the "aww factor". Children in their unaltered state is best, and it's reality. Not to mention she's eating way too much chocolate, sugar and raw eggs! Ew.
Overall: idea good, taken too far and kind of a bratty little girl. Good luck with that.