I hadn't thought of converting them. They're audio files, so they shouldn't be a problem.
I also found an app called Dropbox, which will store up to 2GB of space free of charge on their servers. Then you can access your data through their app on your iPhone. That sounds like the way to go in this case.
Heuuu you will need internet to access dropbox compare to if you upload them to your itunes app on your phone. You can play it whenever you want. Unless your purpose is to share it.
The tutorial videos are several gigabytes in size. I'm not sure I want to eat up all my 16GB of space for them. However, I suppose that I could transfer a few vids at a time instead of the whole set. Or either watch them, then delete them off my iPhone when I'm done to free the space back up again.
This iPhone is the coolest thing ever! (Did I mention that I'm brand new to smartphones?)