For more on how to add audio, videos, images and embed media please check out the links below.
Audio
Upload Audio to Posts & Pages
Embed Audio
Embed Audio Boo
Embed SoundCloud
Documents
Upload Documents
Embed Documents
Images
Add Images to Posts & Pages
Image Gallery
Post from Flickr
Image Alignment
Image Settings
Fix sideways or upside down images
Media Library
Managing files
Uploading files
Deleting files
Storage Space Allowance
Video
Upload Videos in Posts & Pages
Embed Videos
Daily Motion
Flickr
SchoolTube
TeacherTube
Ted Talks
Vimeo
YouTube