"We will stop showing existing annotations to viewers starting January 15, 2019. All existing annotations will be removed."
It was bad enough you discontinued annotations, but to nerf them completely from old videos? FUCK YOU, @TeamYouTube. Seriously.
https://support.google.com/youtube/answer/7342737 …
Only seeing this reply now... But yes. That was a sad day as well. YouTube wants to control all the traffic.