Helping you connect with your fans is extremely important for you and for us. This includes replacing little-used features with better ones. Currently video responses have a click-through rate of .0004% -- in other words, only 4 out of every 1 million users who sees a video response clicks on it. So, on September 12 we’re going to retire this little-used feature as we work to develop more effective fan engagement tools for creators. The team is focused on enabling you to share video links in comments. Doing this in comments will let creators and viewers add more context to a video, and more context should drive more engagement.
In the meantime, you can continue to encourage fans to upload videos with specific titles, hashtags or descriptions (e.g., Video Response To Taylor Swift's Video "22"), so you can find these by searching for them. If you want to highlight them, you can use playlists and channel sections instead of displaying these videos below yours. Any video responses you or your fans have made will still be available and discoverable.
Also, to help your audience find more of your channel’s videos we recommend using features like InVideo Programming.
The YouTube team