I'm trying to learn pan cropping, but I cant seem to get my graph editor to look like the one in this video https://www.youtube.com/watch?v=PawYgSW8MlY
Whenever I use the graph editor its just some weird purples lines, instead of those white lines shown in the video. Any help would be greatly appreciated thanks.
First, you didn't pick a very good tutorial. His workflow is way to complicated for what he is trying to do and his explanation leaves out a lot of important details.
Second, Read the help files on the Graph editor. Sounds like you're looking at the value graph instead of the speed graph.
If you type Graph Editor in the Search Help field at the top right corner of AE you'll get this:
This Graph Editor tutorial, about 3 down on the list, from our good friend Mylenium will help you sort things out: