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.
Why don't you guys ever listen to the community you've made? Why don't you fix the actual issues rather than taking some random, unwarranted, and unwanted turn into Whatthefucksville? People want their custom thumbnails. People want to see what subbed channels post. Not this.