Simply use rehearsed timings and audio narrations in your presentation and
upload to
http://www.authorstream.com/ and you will get the following options:
1. A unique page for the presentation, in which the presentation plays in a
Flash player.
2. Embed code for your own blog or site, using which, you can have the
presentation running on your own site.
After some time, you will get two more options as clickable icons next to
your presentation (only if your presentation used rehearsed timings):
1. Download as video
2. Download for iPod
You can download the video version and use it to upload to Youtube or other
video sharing sites.