To watch programmes in standard definition (SD), you’ll need a broadband speed of at least 2Mbps. For high definition (HD) viewing you'll need at least 3Mbps.
The good news for most of us is, our broadband speed is usually well above this.
If you're having problems playing a programme, you're most likely to have a weak wi-fi signal, wi-fi interference or other connectivity problems.
Check your internet connection by seeing if you can use a smartphone or tablet near the TV. If they don't work either, it's best to contact your internet provider.