In general, streaming video on platforms such as Netflix or YouTube TV requires 5 Mbps to stream in standard resolutions.
If you want to stream in 4k Ultra HD, you will need a minimum of 25 Mbps.  However, streaming even one video in 4k HD may use up all of your available bandwidth. For that reason, if you like high-definition video and you have more than one device connected at a time, we recommend a speed of 50 Mbps or more.
For instance, say you have a 25 Mbps down connection speed. If the total capacity of your internet connection was a pie, each device on the network gets a “slice.”
Your total potential speed is split across all of the devices connected to the network. So, a 25 Mbps plan may only be providing 10-15 Mbps to Netflix — depending on how many devices are taking a “slice.”
Also, using WiFi will always be slower than a hardwired connection. Trying to stream over WiFi can produce less-than-stellar results.
Thankfully, there are a few things you can do to ensure that you’re maximizing your chances of a trouble-free streaming experience:
- Connect your streaming devices to the router with an ethernet cable whenever possible.
- When streaming over WiFi, position the streaming device as close to the router as possible, with no physical barriers like walls or furniture between them. This will help you achieve a more stable connection.
Use online bandwidth calculator to get an estimate of the speed you actually need to stream on multiple devices at home.