From File Audit's Control Panel you can specify the types of files that you wish to scan for:

Files with common extensions.
	Images: .BMP, .GIF, .JPEG, .JPG, .JPE, ,EXIF, .PNG and .TIFF
	Video: .WMV, .MPG, .MPEG, .AVI, .MOV, .QT, .ASF and .DAT
	Web Pages: .HTM, .HTML, .ASP and .PHP
	Music: .MP3, .M4A, .M4B, .M4P and .WMA
Images and videos regardless of extension.
	Scan every file in the target drive / directory