YouTube will delete existing video annotations on January 15, 2019
You'd think Google would prioritize shipping the ability to replace the underlying video file for a video since it's impossible to do so: <a href="https://support.google.com/youtube/answer/55770?co=GENIE.Platform%3DDesktop&hl=en" rel="nofollow">https://support.google.com/youtube/answer/55770?co=GENIE.Pla...</a><p>But no. You can trim your video. You can delete it entirely, and suffer the consequences. But you can't simply fix and replace a video that may have had erroneous content and videos which had been "patched" by annotations in the past will now appear without context (aside from descriptions perhaps).<p>That's some impressively lousy product stewardship, and I say this as someone who mostly disliked annotations as most people 
here seem to.