Haven't tested this, but I think if you replace this:
<streamFormat>mp4</streamFormat>
<media>
<streamQuality>SD</streamQuality>
<streamBitrate>1500</streamBitrate>
<streamUrl>http://video.ted.com/talks/podcast/SethGodin_2003_480.mp4</streamUrl>
</media>
with this:
<streamFormat>hls</streamFormat>
<media>
<streamQuality>SD</streamQuality>
<streamBitrate>500</streamBitrate>
<streamUrl>http://devimages.apple.com/iphone/samples/bipbop/bipbopall.m3u8</streamUrl>
</media>
Might do the job. Set the bitrate to the lowest bitrate of a multibitrate stream, or the bitrate of a single bitrate stream, if you set 0 as your bitrate, it will take a longer time to buffer and stream.
- Joel