where is the video?
Don't think there is one. It's her "story" that went viral, not a video.
Here is a video of the incident: http://www.abc4.com/mediacenter/local.aspx?videoid=3994467
And a link to an article with more details: http://www.dailymail.co.uk/femail/article-2299384/Chilli-burger-Autistic-girl-kisses-cheeseburger-fixed-kindhearted-Chilis-staff-eat-sliced-two.html