To add a video to a new project, click on the 3 small dots in the corner of the video that you’d like to move, and then select Move to project. From there, you’ll see a list of all your projects and get to choose which project that video should go to. If it’s already in a project, that project will be listed in purple, with the other projects listed in black.
You can also select “None” from this menu to have the project be unsorted. Any unsorted videos will appear in the All Videos section.