This displays the Movie Properties dialog box.
This displays the Entity Picker dialog box.
Click on the Resources folder for the site you are in. Then click on the Upload File icon to upload the mp3 file. If the file is already in Resources, click on the file and then choose OK.
This displays an upload file dialog box.
Once you have located and selected the audio file, click Open to upload it.
Once the file finishes uploading, it will show in the file directory listing and will be selected by default. Click OK to continue.
The editing display will show the embedded audio player.