So Crushed Pixel created the Replay Speed Build Generator. https://www.replaymod.com/files/speedbuildgen.jar
https://twitter.com/CrushedPixel/status/750420977499136001
I created this video
showing how to use the SpeedBuildGenerator. seeing as it's a command line interface, i figured many people would be confused on how to use it. so i made a very easy to follow tutorial on how to convert your MCEdit Schematics to speed build Replay Files.