The media item search and filtering functions can be found on the left in the media bank. You can filter the desired media items, for example, by the media type and resolution, the specified media categories, the required source courses or by searching filenames by using keywords.
In addition to this, you can also filter the media items that you have modified yourself or that are not used in any of the online courses in Composer.
Finally, remember to activate the options by clicking Apply.