The document discusses how to embed different types of multimedia content in HTML pages, including audio, video, images and animations. It provides code examples for playing audio and video files in different formats like WAV, MP4, SWF and WMV using elements like <object> and <embed>. YouTube videos can be embedded using <iframe> or <object> tags. Multimedia files have specific file extensions depending on their format, like .gif, .png, .jpg, .swf, .wav and .mp4.