In this video we cover how to work with windows! Some people have really been waiting for this and it's been a long time coming, I know. This is the last major piece of information you need in order to be able to work with many files in Vim. Windows give you a viewport on to your buffers and now that you've got a lot of buffers loaded, you're going to want to see more than one at a time.
Head to derekwyatt.org to make some comments if you'd like and check out some of the other videos in the different categories. There are also some pointers to some keyboard mappings you can use to make things a bit easier for working with many windows (at least they make it easier for me, anyway) at derekwyatt.org/vim/vim-tutorial-videos/vim-novice-tutorial-videos/