You can check in which spots a media file is used.
To do so, perform the following steps:
In IXM One, go to Content > Media management.
In the Media groups pane, select the spot group where your media is located.
In the Selectable media pane, hover your mouse over the media and click
Edit properties. Alternatively, select the media and click Edit > Edit properties.In the Edit media properties window, switch to the Occurrences in spots tab.