
It real simple, you click on it, then say the url in chat.
Put the script into an object. The object must belong to the owner of the land, but anyone can change the stream.
CODE
//Script by Gattz Gilman
key per; //key of person who clicked
integer lis;
default
{
on_rez(integer start_param)
{
llResetScript();
}
touch_start(integer total_number)
{
per = llDetectedKey(0);
lis = llListen(0,"",per,"");
llSay(0, llKey2Name(per) + ", please enter the url through chat.");
}
listen(integer channel,string name, key id, string message)
{
llSetParcelMusicURL(message);
llSay(0,"Parcel URL set to: " + message);
llListenRemove(lis);
}
}