This is becoming more popular on the web. This can compress images better than a gif can, but not all browsers support it yet. Sound and Video Sound and Video are not as popular as they should be on the net. This is because of loading time. WAV files are large by nature and therefore take too long to load.
Videos have huge filesizes and are therefore scarce.
I will tell you how to place Video and sound on your page put I won't recommend it. Its the very same for video.