(YouTube Link) - A quick animation of what happens at a molecular level when a strong acid is added to water and when a weak acid is added to water and how their Ka values compare to 1. (about 3 minutes long)
(YouTube Link) - A very basic introduction to what a buffer is and the terminology associated with it using Acid Rain and river water. (about 11 minutes)
(YouTube Link) - Titration information and examples of titration curves starts at about 6:55 in the video if you are looking for only that information. The video is also posted in Chapter 14's download page for the introductory information at the beginning.
(LINK to video referenced in the vodcast)
Titration Problem Explanation and Example Calculations - This site walks through titration curves for acids and bases and includes example calculations. You can copy the problems and try them on your own and then go back and check your answers with it.