Hey, I just discovered this software and it's great! I sometimes use Tubebuddy's Chapters Editor. It allows you to add chapters on the fly to one of your YouTube videos. It opens a modal popup with the YouTube video embedded via an iframe. Something similar for chaptertool would be amazing. This would mean I wouldn't have to load the video up from local storage. Tubebuddy's Chapter Editor is a paid feature so I'd love a free open-source tool to use instead.