This video is high quality, so you may want to change to 480p mode.
This video preview shows the first parts of the game, demonstrating eventing, the mapping and general gameplay that may be seen in the final release. The first part of the video shows the CGI intro that you may have seen before, so skip it to 3:07 if you want to but for anyone who hasn't, enjoy!
There are some issues that I'm already aware of that you may see in this video, one of them being the dodgy crystal room altar, still working on it to fix alignment issues so you won't be seeing this in the final game. Also Baron town is empty as it's still being mapped.
So, this video will give you a good insight on how much FFIV VX is progressing. Watch out for more videos soon!