how many mothballs to use in a room

video 1.0 Open.Video https://open.video 640 480 how many mothballs to use in a room <div style="position:relative;padding-top:56.25%;"><iframe src="https://open.video/embed?contentId=e14b4513dd2a90e4dee4051e306c3a4c9d6dcccaf03c2189837a0650e0438f20&channelBranding=1" style="position:absolute;top:0;left:0;width:100%;height:100%;border:0;" allow="autoplay; fullscreen; picture-in-picture; encrypted-media" allowfullscreen></iframe></div>