2. The 2000 Walt Disney World Vacation Planning Video

Nearing the end of the Disney Decade, Walt Disney World put together an incredible celebration honoring the new millennium. This video shows some of the unique aspects of that celebration, while also marking the changes that occurred around Disney World in the late 1990s.

Of course, the most notable addition is Disney's Animal Kingdom, but Rock 'n' Roller Coaster, Tower of Terror, DisneyQuest, Blizzard Beach, and the Wide World of Sports all opened in the intervening years.

Ultimately, what you'll notice is that the Disney of today doesn't differ too greatly from the Disney of 2000, and there's something to be learned from that. The hotel boom slowed and the emphasis shifted from core upgrades of the entire resort to changes at the fringes – a pattern Disney has followed until very recently.

But the video's greatest value is in the walkthrough of the millennium celebration, beginning at 3:40. And if you listen closely – you'll probably recognize the accompanying song. The show it comes from has been playing every night at Epcot since the millennium began.

1. Electrical Water Pageant

The more things at Disney change, the more they stay the same. Even during the Disney Decade, the focus was always on generating new experiences for families to share and new stories that would amaze guests for generations to come.

While some of the most lasting things at Disney World are timeless, some remain in spite of their blatant anachronism. One such experience is the Electrical Water Pageant, a floating parade that has run in Walt Disney World's Seven Seas Lagoon since the resort's very first month.

It's beautifully dated, featuring synth-y versions of classic Disney songs, adorable floating light shows, and a charming patriotic finale. While it has changed slightly over the years, the experience remains the same. It's wonderfully retro and can still be viewed on the Lagoon to this day.

After you've watched the modern version in the video above, check out this version recorded on Super-8 in 1976 – they're almost identical:

That just goes to show: if you want to experience retro Walt Disney World, you don't have to go searching the depths of YouTube or your family's attic. Some of it can still be found in the World – if you know where to look.