Well worth a watch is the video - City's Coming Home.
So far, no-one has claimed responsibility for this but it is brilliant and whoever has done it deserves a massive pat on the back and it should be played on the scoreboard at the Ricoh Arena before Coventry City's game with Gillingham.
To see the video - click on https://www.youtube.com/watch?v=CFcml0XFMeE&feature=youtu.be