RTSP IP-Cam Viewer is an Android app to watch RTSP video streams; this format is typical of inexpensive IP security cams.


Goals:

an extremely light-weight open-source app with minimal features and minimal UI
ability to add video streams (including via import of JSON text files)
display of enabled video streams in list- and grid-view, full-screen view of a single high-res video stream
Notes:

this app does not require the latest Android versions, so your old device can be put to a new purpose