We have seen many OIS demos and comparison videos of Lumia 920 and we collected them for your convenience :).
http://nokiapoweruser.com/2012/09/30/weekend-watchupdated-collection-of-lumia-920s-ois-demo-videos/
Now, we have a new Lumia 920 OIS demo video with us. This new video is different in that it has been shot in a moving car and due to this the effect of OIS becomes much clearer. They have compared it to one other smartphone cam without OIS, but they have not mentioned name of the competing smartphone. OIS, truly makes a hell lot of difference in capturing video while riding through bumpy terrains. Check it for yourself.
[youtube=http://www.youtube.com/watch?v=3XxUk2TYvDw&feature=player_detailpage]