I struggled with pulling the roller out of my door the way you did with YouTube video. The slot was too small, and the end of the spring was blocked from sliding far enough to pull it out. I did figure a method to remove by moving the spring a little bit then pushing it out with a nail through the screw hole. I commented on your YouTube video but couldn't attach photo; then I found you had this comment section for uploading. Attached is the image. :) My sliding door is over 30 years old, so maybe designs changed?