Seed Savers Exchange has an archive of educational webinar videos including seed saving from specific plants including tomatoes, peppers and eggplant. There are also videos on isolation, seed starting and hand pollinating.
Seed Savers Webinar Archive
You will see a YouTube video viewer, in the bottom right hand corner is a square bracket, click on that to make the video viewer full sized. At the top left hand corner are 3 lines and the word PLAYLIST, click on that and it will show you a list of the archived classes. Select the one you want to see and click the play arrow.
Also go the following link for other great educational resources.