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.
Yeah so we're just going back to the way thumbnails where done in 2010 orrr? Do you have a better plan? Cause I remember the 2010 thumbnail system not working too well.