That the new online video craze sparked by YouTube would have an impact on popular culture has been obvious for some time. What that impact will be is a bit harder to assess. But early indications are that what’s good for online video purveyors isn’t necessarily good for traditional broadcasters: a new study says that “43% of Britons who watch video from the internet or on a mobile device at least once a week said they watched less normal TV as a result.”