Brian has trouble watching streaming video: the internet "cuts out" on him. Leo says it sounds like an overheating router. The router is just a cheap, dumb computer and if it's running a lot of streaming, chances are his router is overheating. If it is, then it may be time to get a new one. Same thing with the modem. He should also try unplugging the router, waiting ten seconds, and plug it back in. If it comes back, then he'll know he needs a new router.