I feel watching, or, if you don't have time to sit down and watch, listening, to the youtube, is always a good idea to learn English. On one hand, you can learn the most NATIVE English, because, speaking English like a native speaker is always the greatest challenge for us. On the other hand, you can get yourself familiar with the trending topics and latest news, so that you are not afraid of striking up a conversation with your colleagues.
The following is one of the many youtube channels that I subscribed to. Highly recommend.