You can now create overcapture videos with any 360 camera on your smartphone for free, using Collect 360, a 360 video editing app. Collect 360 was updated to add an overcapture feature. Here is a tutorial:
The overcapture feature is still in beta, and is being rolled out to users gradually. As they roll it out, they are fixing issues as well. If you want to get early access to the app, please post a comment to the video. They’ll see it and contact you.