We are running a small experiment where 0.3% of viewers will see an auto-generated thumbnail, instead of your custom thumbnail. We are not removing the ability to create your custom thumbnail, but we hope to gain insights on auto-generated thumbnails for the future.
Nobody wants this. This is a terrible idea. We are all angry at you AGAIN. Please stop doing things that will actively hurt EVERYONE. You have absolutely lost touch with your entire platform.
). Avi by