You guys need to learn to read. The hacking tools used here were not for "cheating" or for doing anything that you couldn't do yourself if you were sitting down simply plying the game. In fact, the tools were used to make the overall speed run MORE like a single sit-down session at the game rather than a collection of demos strung together.
If you just make a speed run by stringing a bunch of demos together, what happens is that speedrunner A makes a demo of level 2 and ends the level with 40 hp. Speedrunner B makes a demo of level 3 and starts the level with 60 hp, and before picking up any health boxes, loses 50 hp for whatever reason. If both demos end up in the speed run, this speed run is now actually not legitimate because this would have been impossible if you were actually sitting down at the game playing it start to finish. The hacking tools are merely used to make the speed run legitimate by setting the health and ammo at the start of level 3 to the health and ammo at the end of level 2, creating continuity over the course of the speed run as a whole.
tl;dr the "hacking tools" are NOT CHEATING IN ANY WAY, and you should learn to actually read things before you jump to conclusions.
If you just make a speed run by stringing a bunch of demos together, what happens is that speedrunner A makes a demo of level 2 and ends the level with 40 hp. Speedrunner B makes a demo of level 3 and starts the level with 60 hp, and before picking up any health boxes, loses 50 hp for whatever reason. If both demos end up in the speed run, this speed run is now actually not legitimate because this would have been impossible if you were actually sitting down at the game playing it start to finish. The hacking tools are merely used to make the speed run legitimate by setting the health and ammo at the start of level 3 to the health and ammo at the end of level 2, creating continuity over the course of the speed run as a whole.
tl;dr the "hacking tools" are NOT CHEATING IN ANY WAY, and you should learn to actually read things before you jump to conclusions.