Synology no longer provides software updates for DS video on Windows Phone (starting May 11, 2018) and Windows UWP (starting May 25, 2020). For more information on the supported platforms of DS video, please visit Synology’s official website.

You must own a Synology NAS to run this app and be running Video Station 1.6 to get the complete set of features

DS video is the best way to stream your video collection on your DiskStation, all from your Windows Phone. DS video sorts your video contents by movies, TV shows, home videos as well as recorded programs, and movie information automatically retrieved online is also available to make choosing a film all the more convenient. If you have plugged a DTV dongle onto your DiskStation, you will also be able to record TV programs, as well as view the TV program guide to manage the recording schedule remotely.

Find all detailed features about the app on our website:
www.synology.com > NAS > DSM 5.2 > Mobile Apps > Software Specs
https://www.synology.com/dsm/5.2/software_spec#DSvideo