A mi me pasa igual, desde ningun aparato puedo conectarme a youtube. Esto encontre, los demas links eran videos de youtube o links falsos
What YouTube Error 503 is
YouTube error 503 is a server-side response code that means the site’s server is simply not available for now. It always occurs with the reminder of 503 Server Error: Service Unavailable. It can happen in any browser in any operating system, even on your smart phone, or on some applications. This YouTube 503 service unavailable error is generally caused by the Connector once either the connection times-out or it’s unable to connect to the proxy server. Mostly, this 503 error occurs since the server is too busy or when there is maintenance being performed on it.