This is the original video by Elizabeth Evans. She says:
This is my four year old daughter, Abigael, after hearing one too many mentions of the election.9,535,791 views.
It's sad that you have to wade though all the duplicate uploads to find the original.
Also:
Huffington Post: Abigael Evans Video: NPR Apologizes To 4-Year-Old Who Is 'Tired of Bronco Bamma And Mitt Romney' (VIDEO)
What's Trending: Meet 4-Year Old Tired Of Barack Obama And Mitt Romney (Video Interview)