Hello Phil,
You can select your 1image/15mins upload frequency under the 'customize' option on the subscribe page. You will simply need to configure your camera so that it uploads according to this frequency. You will want to check your camera configuration pages first to ensure that it supports this frequency. Once you've done this, you will be able to download any snapshot images to use for a time lapse video, or you can use the viewer on our website/mobile applications.
Feel free to email us at support@cameraftp.com with any other questions.
CameraFTP Support