How to delete old or unwanted videos from the device from the mobile app

At this time, there is no way to clean up the videos you no longer wish to keep or view from the mobile app. 

It is in our development pipeline to add that ability to delete/manage the videos but there is no ETA on its release.

Although, you can delete the videos from the internal storage or SD card, if applicable.

See:  Manage videos from internal or external storage