Happy birthday, YouTube! The insanely popular video sharing website turned five this year, and funny man Conan O’Brien celebrated by counting down his five favorite YouTube videos.

So what made Conan’s list?

Leeroy Jenkins

*NSFW Warning: This video includes adult language.

This would be the first time I’ve seen this video. I have to say, I was bored out of my mind until a minute a half into the clip, and then I was laughing hysterically. Long Live Leeroy!

Pinky the Cat

Aw what a cute cat…until he goes haywire and starts attacking everything in sight. I have a feeling it took Pinky a long time to find an owner. And I certainly hope that nice man is wearing a jockstrap.

CSI Miami – Endless Caruso One Liners

There’s a reason I don’t watch this show. And it’s because David Caruso looks like a complete moron—and sounds like one—through each episode. Now I can get my laughs in without having to sit through an entire episode. Classic.

Winnebago Man

*NSFW Warning: This video includes adult language.

Meet the Winnebago Man, Jack Rebney. Keep your day job, Jack. I don’t think you’ll ever make a living as a commercial actor. You seem to be a little too high-strung for that kind of high-pressure job.

Der Trololo-Song

Take a funny-looking man. Add some funny music. And make them all foreign. What is the result? A YouTube phenomenon. It lasts about two minutes too long, though, in my opinion.