actually me and my friends did it like the video (we actually entered the castle in a more regular way, using a raft and then using the rails) and came to the first ganon bosses. I let them play and everytime one died they needed to switch controllers, they played all previous zeldas but never botw and they came really really far in something like 4 hours, while switching the controller. (of course they skipped all the main quests).