Just use the scripts in an empty project and follow the instructions of the video. The scripts are also commented.
"editor_movement.js" needs to be put in the Editor folder within your project's Assets folder. Create the folder if it doesn't exist.
Also, create the tag "Waypoint" in the tag manager.
Edit (07/13/10): I tweaked and improved the scripts. Download them again if you got the earlier versions.

recordingscript.js |

save.js |

editor_movement.js |

editor_scripting_and_save_hd.mp4 |