A survey by Canadian company Sandvine found Netflix and YouTube together account for a full half of Internet traffic in North America.
Netflix controlled 32.3 percent of downstream traffic during peak periods while YouTube accounted for 17.1 percent of peak downstream traffic, Sandvine reported in a release Tuesday.
Globally, however, YouTube surpasses Netflix on fixed and mobile networks, making the Google-owned video site "the leading source of Internet traffic in the entire world," Sandvine said.
"While watching a full-length movie, or a 22-minute sitcom, on a 4-inch smartphone screen may not be the ideal viewing experience for everyone, for many subscribers it is becoming a viable experience," Sandvine said.
Sandvine said its report was based on data collected in a sampling from its customer base of 200 service providers worldwide.