NEW YORK (TheStreet) -- The fall television season has arrived, but actual televisions are playing a lesser role in it this year.According to Nielsen's Three Screen Report, the average American is still watching 35 hours of television a week, but also 20 minutes of online video and four minutes of mobile video. And 59% are watching TV while surfing the Web. Americans are actually way behind their global neighbors, as 70% of online consumers worldwide watch Web video and 11% watch mobile video, with the overwhelming majority of those in the Asia-Pacific area. Americans are catching up, however, as online video streaming increased 1.3% this summer to 10.2 billion videos in June alone. For Nielsen and television networks, this means figuring out a ratings system that counts those online views among networks' total viewership. For sites such as YouTube, Hulu, ESPN and MTV Networks, the 3.1% increase in time spent watching online video over the same period last year means viewers are no longer content to sit and wait for their favorite programming.