I bet YouTube is not a source many people automatically think about but there's a lot of interesting information there. When you write a family history it is always good to set your ancestors in context. This means researching the area they came from. Here's a very interesting example about the history of Edinburgh that would be a great start off for further research.http://www.youtube.com/watch?v=GkjEzYaP9Sk "Birth of a City."
Some of my direct ancestors lived in Edinburgh and even though I grew up in Scotland, loved history in school and lived in Edinburgh myself I still learned a lot from this video.