It’s very interesting to learn any new language from a video, here in this article I’ve collected many ajax tutorials from youtube.com and video.google.com, enjoy
Tutorials are covering ruby on rails, Script#, Jquery,.. and more

Script# is a C# compiler and set of frameworks that makes it possible to write Javascript and Ajax applications in C#, enabling you to benefit from compile-time type checking, error reporting, intellisense, refactoring, class browsing, doc-comments etc.

Ruby on Rails web application framework, Ajax on Rail is the support of ajax in Ruby on Rail framework

AJAX in Ruby on Rails tutorial