2001: A Space Odessey - Ending Explained

The first time I saw 2001: A Space Odyssey I was in my teens. I had no idea what the heck was going on except it had something to do with a mysterious "black rectangle", and a couple guys in space with a super computer named Hal that malfunctioned. Now that I'm older I still don't know what it's about. This short video does give us a little insight, but I think for most of us it still doesn't quite fit our idea of how a story should end.