Yes divx is the best codec I know. Much better then flash. I am very sad that some people do not try divx and stay with flash. Most fear a computervirus, if they asked to download the plugin. But there is nothing to fear. I was a former stage6 user, but they shut down the page. We were contected with 5700 people about food..:-)
If you want to transfer your videos to divx, export your file from the editing system in the best quality. (Final Cut pro has a direct divx exportfunction) For anything else get the software "Dr. Divx". You can get it on http://labs.divx.com/DrDivX Then you have to find a place, where you can host the files. I use http://www.blip.tv They transfer the file to flash, but keep the divx-file. So you can embed the video from there.