Dear user, we are sorry for your inconvenience. If you are using SD card to store, currently only supports selective deletion of videos stored in the SD card through the computer, and does not support deletion through the App, but the latest video will automatically overwrite the oldest video in the SD card. It will not have the problem of being unable to record. If you are using a cloud storage service, you can delete the playback you want in the App. (Not all products support deleting all playbacks in one step, it is depending on the manufacturer's settings)