Add !value command

[EchoFrost]

Should include a message or a link embed with the following:
https://www.youtube.com/watch?v=WnPjqt6vEzA

📈

    elif message.content.startswith('!value'):
        msg = 'https://www.youtube.com/watch?v=WnPjqt6vEzA'.format(message)
        yield from channel.send(msg)