Adobe Premiere help.

[Croyles]

I always export it as an AVI.
I have div-x and x-vid, but how is that gonna lower the file size, dont they just PLAY files???
Theres obviously something im missing or that I dont know yet...

Also I forgot to say. When I played the file, the audio was all messed up with crackling sounds even though the song that I used for my video was crystal clear and played perfectly on the Premiere monitor...