How can i see a video texture in the timeline?

Well, i got a video as a texture of a cube and i want to see the video while moving the timeline, but it dosn´t move, i want something like “Add background image” option (that allows you to see in realtime the video).

If you use a movie as a texture in the Texture / Image panel enable the ‘Auto Refresh’ tickbox so it updates on a frame change