So Google decided to kill off the YouTube Video Editor and also the Photo slideshows within YouTube as of September 20, 2017. Google quietly announced this in the YouTube Help Forums and said these tools are being removed because of "limited usage."
I know I have personally used the YouTube Video Editor several times in the past several months but I mostly use iMovie for my video editing.
Marissa from Google wrote:
We wanted to let you know that the Video Editor (youtube.com/editor) and Photo slideshows will go away on September 20th, 2017. We’ve seen limited usage of these features, so we’re retiring them to focus our efforts on building new tools and improving on other existing features. You’ll have two months to finalize any video projects before we turn off the features completely. After that you will no longer have access to projects in the Video Editor, but any videos already published with the Video Editor will not be affected.We are keeping the Enhancements feature in Video Manager. With Enhancements, you can continue to enhance your uploaded videos with edits such as trimming, blurring and filters.
You can download your own videos from YouTube in 720p or use Google Takeout to retrieve your original files, in case you are looking to remix your uploaded videos into a new video.
There are also many free and paid third-party editing tools available if you’re looking for new editing software. If you have any questions or suggestions on editing software, please feel free to check out this forum or our Creator Community.
Here is the help document on this announcement.
This is obviously not SEO news, but I do my share of videos on YouTube and I found it interesting that Google is dropping yet another product.
Forum discussion at YouTube Help Forums