Switching out videos

I have a scenario where I have a really long video. I would like to break it into chapters similar to:

Full video

1. Chapter One

2. Chapter Two

3. Etc...

Embedded video

The embedded video would start off as the full one. But if you click on a chapter it would switch to the video of just that chapter. Any idea how to swap out one video for another?

I see where the embedded video is in the following code:

<p>
<li-video vid="t3N3N1MjocLoQKDUXhVAOVBGxebZHUmw" align="center" size="original" width="640" height="480" uploading="false" originalwidth="640" originalheight="480" thumbnail="http://ak.c.ooyala.com/t3N3N1MjocLoQKDUXhVAOVBGxebZHUmw/Ut_HKthATH4eww8X5hMDoxOjAzO_OPgf"></li-video></p>

I can find out the other video IDs. Just can't figure out how to say if you click change the video. Any ideas?

For bonus points if you can help me figure out the thumbnail value.

thanks,

Jonathan