Network streaming won’t erase

[Sonomajoe]

I have files on my server/ so I copied the url and pasted into network stream area - and I hsve tried to erase them to make room for new urls . There doesn’t seem to be any way to get rid of them.

If I can get help to figure this out - then I wonder if I can group a set of urls together so they play one after the other. Like an MP3 player would.

OR
Is there an iOS app that works like an MP3 player that uses the network stream section like this app does?

Thank you - sonomajoe