Ghosts in intro video just sit there

[Serpwidgets]

I am trying to make some ghosts to have cars driving on the track during my intro. Instead of moving, they are frozen in time. I have tried the offset, but the car will stay in the exact position (such as floating in the air) the whole time the video is running. Am I missing a button or checkbox somewhere?

[Serpwidgets]

This went away, either because I saved and reloaded the map, or because I recorded ghosts using the little record button inside mediatracker, instead of using the "record a mediatracker ghost" button when you first enter MT.