Recently, Google announced it will be deprecating one of its best kept secrets known as the YouTube Editor. This was one of my favorite tools for editing video in the cloud, especially since it also worked well on a Chromebook. Sadly, any projects not completed by September 20, 2017, will disappear when the application is removed from service. The full announcement regarding the changes can be found at: https://goo.gl/LDx2tE
Hopefully, you will find some viable alternatives by expanding and reading this post.