Refresh the active tab or a tab that you want to grab media resources (image, audio or video) from.
If there is a video source in the tab, it needs to be streamed for the media source to be grabbed.
When the intended resource is grabbed, make sure to press the "Pause" button to release network observer and prevent cluttering of this window with new resources.
Detection of YouTube resources is locked because of restrictions of the Chrome Store.
To download all loaded images on a page, use the image grabber tool from right-click over the toolbar button
To convert media files to different formats, use Media Converter add-on.