Though not a search campaign, it is still digital. I found this and thought it was amazing:
It’s very interactive and great use of a brand channel – taking over the whole of the above the fold section. It’s very different – pretending to be a 404 Page cannot be displayed error and throughout the minions and film characters drop out of the video to interact with it. The minions also very cleverly pull in the usual Youtube format of video on the left and links on the right.
And just seen this link to a minions