Playing mp3 files via Chromecast - one by one only.....

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Hi - new simpleton user here. Using Chromecast Audio.
Finally got this to work playing my laptop mp3 files onto my home stereo using Videostream - successful only after a marathon session with Google support from the Philipines.

I can only play mp3's one song at a time though. Is there any way I can select a number of files or use a Playlist function?

Its a clever system, that seems to work well, but a long, long way from "Plug and Play" as advertised.