"Of course, if you’re looking to get into the streaming big leagues to access the growing array of 4K Ultra HD streaming content available, you’ll want to raise the stakes even higher when it comes to broadband speed. For streaming services like Netflix, YouTube, and Amazon you’ll likely want to have at least 25Mbps on hand (which is what Netflix explicitly recommends). If you’re only going to be downloading 4K content from sites like MGO or Ultraflix , 10Mbps will probably suffice. In any event, fast and reliable Internet is an integral key to a positive streaming experience."

https://www.yahoo.com/tech/cord-cutting-101-q...24701.html