def processmsg(msg, rcpt):
    if msg.startswith("!"):
        return command(msg, rcpt)
    elif "youtube.com/watch" in msg:
        return msg.replace("youtube.com", "iv.datura.network")

def command(msg, rcpt):
    if msg.startswith("!help"):
        return "chatbot commands: \n" + "!help    Show this help page"