You can add media to Adobe Premiere Elements using one of these methods:
Capturing from live or recorded sources
Importing files from other types of storage
Adding from the Project Assets panel
Recording narrations from a microphone
When you add media files to Adobe Premiere Elements, they are added to the Quick view timeline and the Expert view timeline. In addition, they are added to the Project Assets panel in the Expert view.
A thumbnail, called a clip, represents each file in the Project Assets panel. Clips, whether they contain audio, video, or images, are the building blocks of your movies.