Yet Another Avi Info is one of the best tools to display information about your avi files. You can see data like the framerate, the used codecs, the running time, the author information and the exact bitrate of video and audio.
The best way to learn it is to try it out! You have the ability to undo changes before you quit the program.
YAAI is an improved version of Lee Pages' "Avi Info". Everything was speeded up, many new functions were added and some bugs were fixed. So if you used Avi Info before, just try out Yet Another Avi Info!
You can also synchronize your video and audio stream in a very comfortable way.