Crazily this is controversial because it features an inter-racial family – namely a black father, a white mother, and a biracial daughter.
The original video on YouTube is now private: https://www.youtube.com/watch?v=kYofm5d5Xdw
The original video immediately drew the normal troll behavior and racist slurs. For a commentary on that see, for example, here
Here’s another Cheerios advert featuring the same family. It was produced for the SuperBowl 8 months after the original advertisement: