YouTube turns 5: See 10 of the most-watched sci-fi clips EVER

Do you remember the elephants? If you don't, then you weren't there that day five years ago last week, when Yakov Lapitsky uploaded the first clip to a video-sharing website—19 seconds of the elephant cage at the San Diego Zoo—and YouTube was born.

It wasn't the most thrilling clip in the world. But luckily, YouTube has gotten a lot more exciting since then.

It's also gotten a lot more sci-fi.

Here's a sampling of the most watched and most memorable sci-fi and fantasy clips. (The Harry Potter puppet show below got nearly 80 million views alone.)

Note that we've deliberately left out the highly watched Hollywood movie trailers, which to our minds would go against the spirit of the list. And since we don't have the several centuries it would take to watch every YouTube video, we're sure we've overlooked many more that are worth remembering. But that doesn't make these 10 any less awesome.

Potter Puppet Pals: 79,622,121 views

Who knew that so many of you would want to find out the reason for the mysterious ticking noise?

Lego Star Wars: 19,126,955 views

Maybe the cutest—and most musical—use of Darth Vader's lightsaber ever.

Star Wars Kid: 16,525,355 views

A high-school kid becomes one of the first viral Internet memes.

Star Wars according to a 3-year-old: 14,630,496 views

"Don't talk back to Darth Vader, he'll get ya!" Thanks for the warning, kid!

'Star Wars (John Williams Is The Man)' medley: 8,604,984 views

An a cappella musical tribute to an Oscar-winning composer.

Ataque de Pánico! (Panic Attack!): 5,846,794 views

The $300 YouTube video that resulted in a $30 million contract to make a Hollywood film.

Star Trek vs. Star Wars: 4,964,084 views

What would happen if the Enterprise encountered the Death Star? Nearly 5 million of you just had to know.

Tokyo Dance Trooper in Shibuya: 3,158,735 views

Danny Choo, in full stormtrooper garb, shows off his moves as he spreads the Star Wars love in Japan.

Fan-Made Green Lantern Trailer: 2,231,924 views

Nathan Fillion didn't get cast as Green Lantern the way the makers of this video hoped ... but we can still dream, can't we?

William Shatner sings "Rocket Man": 1,688,699 views

As performed by Shatner, the Elton John song became an often-spoofed, but never equaled, camp classic.

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