A:Answer The CM500 is only the cable modem. Unless you plan on only hooking up 1 computer and nothing else, then yes, this will be able to allow that single computer to stream online video's. But if you need/want additional computers/phones/smart-tv/etc to also be able to get on to the Internet, then you will need to purchase a Router - with or without WiFi depending on if you wanted to be able to connect to the Internet wirelessly or not.