Kosmicd12

4:51 is Possible - The Fastest Version of Super Mario Bros.

The Absurd History of Level 8-2

4:52 is Possible - Mario All-Stars Speedrun Explained

The Misunderstood Genius of Super Mario Bros.

The Most UNDERRATED Mario Speedrun - Explained

Mario Speedrunners Keep Making History

Showing My TV + Console Setup

Famous Mario Speedrunner Caught CHEATING

The Mario Speedrun where you... Walk?

How Speedrunners Delete the Flag to Save Time

10 Things you've NEVER seen in Super Mario Bros.

Speedrunning Super Mario Bros. INSIDE SM64?!

The BIGGEST Milestone in Mario Speedrunning History

Lakitu Parties ARE BACK

Passing Super Mario Bros. in 5 minutes

Kosmicd12 Plays SMB1 With Eyes Closed

Can you beat Super Mario Bros. if the Floor is Lava?

Super Mario Bros. has a Secret Ending