Watch the unedited run here:    • Super Mario Bros. Warpless Speedrun i...  
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Warpless TAS by HappyLee and Mars608:    • Super Mario Bros. "warpless" TAS in 1...  

Spliced 18;54.997 by Kosmic:    • SMB1 Spliced Warpless Demonstration (...  

Notes:

At 16;46, for some reason, the left clip is not timed properly. I went back and checked and it is fine in the timeline and the video preview, but came out wrong in the render.

Chapters:
00:00 Introduction, Overlay explanation
01:49 11, Flagpole glitch, Framerules
04:55 12 to 14, Mushroom grab, Stomp from below, Fire kill
07:44 World 2, Avoiding fireworks, Manual timer inaccuracy, Bowser pattern manipulation
13:05 World 3, Jumping through platforms
14:50 World 4, 43 framerule, Uncrouch wall clip, Firebar hitboxes
19:05 World 5
20:30 World 6, 63 framerule, Lag
22:58 World 7
25:05 81 to 83, Jumping over pipes, Flag subpixel manipulation
28:10 84, Plant disappearing, Wall jump, Wrong warp, Crouched hitbox
33:15 Conclusion, Bowser hammers, Timing, How to improve the run

Special thanks to my Patreon Subscribers:

Chris Field
Martin Berrum
Matt Cromartie
Mittenz
MrValdez
rictic
Sam Rose
Skyehoppers
Sumnolia
vivas5