The Server Side Playlists functionality is only available for RTMP currently since it is implemented using the RTMP Play2 functionality. There is a trick, however, to do RTSP playback on a Server Side Playlist using Lazy Pull:
1) Define your playlist file: Playlist.lst
2) Define a lazy pull file (ie. myLazy.vod) where the source stream is: uri=rtmp://localhost/live/Playlist.lst
3) Do playback of that lazy file: rtsp://IPofEMS:5544/vod/myLazy.vod
This can also be leveraged to create HLS, Dash, etc streams out of a playlist!