It’s official. Apple’s made a habit of producing long, large and reasonably thorough introductory videos for major new hardware and software they’re releasing.

It’s great for hungry fanboys and tech journalists who can’t get it elsewhere, and I guess for the growing number of folk who want a look at the stuff before plunking down coin for the new stuff coming out of Cupertino. Largely overkill, the hype usually should be enough for other manufacturers, but Apple tends to go overboard about these things (hey, new iPhone TV ads are still coming out up to now, man). Don’t have a problem with it, though.

Recently, some of the better ones have been the iPhone and iPod Touch guided tours (although they need serious help sourcing less awkward hosts for these things - less of the hand gestures, guys! And seriously, we’re sick of the black t-shirts.)

Now, they’ve just released on the Apple site a half-hour video for OS X Leopard, which is coming out on Friday. (For which I will take off from the Tokyo Motor Show and sneak out to the Ginza Apple Store on the 26th to see how they do a product rollout in Japan.) Cool. Us fanboys anticipate these videos like sequels to the Transformers movie.

Watch the Leopard Guided Tour in different resolutions or download it (108mb for iPods and 379mb for the bigger version) here.