Amazon Fire stick is a modified version of Android, so you can install Android apps on it. But not all apps might work due to compatibility issues.
XDEN is a Video Players & Editors android app developed by Paktron. The latest version is 4.4.1 and the it requires a 4.0 android version to run it. XDEN (Android) mobile client software, which is designed for mobile phone on the basis of Android OS (Version 4.0 or higher), can be used to remotely monitor the live video from embedded XDEN DVR, NVR, network camera, network speed dome and encoder via wireless network, play back record files, locally store and manage pictures and videos, control alarm output and realize PTZ control as well. With this software installed in your phone, you are able to log onto the front-end device via Wi-Fi or 3G; besides, if there is no public IP available for the device, it’s accessible by using a dynamic domain name, or by mapping ports to the public IP of router. Notes: 1. Wi-Fi, 2G, 3G and 4G LTE access service must be supported by the phone. 2. Network traffic charges may be produced during the use of this client software. Please refer to the local ISP. Supported Screen Resolutions: Phone, Tablet: 480*800, 480*854, 960*540, 1280*720, 800*1280 or 1920*1080. XDEN was released 6 years ago, and is available for Free.