From ViralVideoLab:

This awesome video shows you how to make a paper airplane fly endlessly. We are using seven mini ventilators to create an uplift. The paper aeroplane must be centered while it performs it turns. So it took me about 35 takes to crreatet this video. If the paper airplane isn´t exactly in the centre of the ventilators, it will drop off. So feel free to build your own paperplane and let it fly as long as you want in your room.