To edit the one in /etc/vlcd/default.m3u I have to do a sudo nano /etc/vlcd/default.m3u. Any other method and it wouldn’t let me save the changes. Dropping a playlist on to your Sd card will work too. It disappears on first boot up though so there is no going back and editing it.
If anybody is interested in using a media keyboard with your pirate radio, it is doable, with a bit work. Use a media keyboard with your pHat Beat, can it be done? I’m using a FLIRC USB IR receiver and an IR remote control with mine and loving the convenience. Phil “gadgetoid” really stepped up with lots help on this one.