I will not open my bator after day 18 unless to add water. Interesting the way you candled from the end. From the video, I couldn't tell if they were good or not. I place my eggs flat on a box with a hole and shine the light up from the bottom through the side of the egg. I thought that all I saw was an embryo in there not nearly developed for day 17 or 18, but I COULD VERY WELL BE WRONG. I am not a pro, but I tossed 11 eggs that weren't solid black in the middle.