You simply record your game while playing all the light levels from the 5 first chapters with Naija, and that's all. The goal is to finish them in a single segment, which means without pausing, cutting the video or any other edits added to the video you are recording, or at least when the timer is still running. Also you can stream your process if you want to share it with people in real time.
For you to have Naija you need to have unlocked at least 50 bandages, and for you to run the levels you need to have beaten at least the 4 first bosses already in your game save. The save file is located in your game installation folder, under "userdata", it's named "savegame.dat". You can use OBS to record or/and stream, it's free. There are plenty of tutorials on the internet to teach you how to use it. http://lmgtfy.com/?q=How+to+use+OBS You can use Livesplit as a timer, it's free too. To learn how use it, same deal. http://lmgtfy.com/?q=How+to+use+Livesplit
By ggs, ScarletSentry means glitch girls, because if you have a save with bosses unlocked, then you might fall on glitch girls