Last week, Nielsen declared the page view meaningless as a yardstick for measuring visitor activity on a website. It’s apparently all — or partially — YouTube’s fault, because people watching videos online don’t clicky clicky to other pages as often.
Although Nielsen already measures average time spent and average number of sessions per visitor for each site, it will start reporting total time spent and sessions for all visitors to give advertisers, investors and analysts a broader picture of what sites are most popular.
Currently, sites and advertisers often use page views, a figure that reflects the number of Web pages a visitor pulls from a site.
Via the almost always prescient Micro Persuasion (link), who predicted the page view’s demise last December.
Andy writes! 
Regarding youtube… visitors get stick to it because immediately after one video is done, another 3 are offered for choice in video box. Now I’ve seen some services like you tube (not YT), put in advertisements and they are receiving ctr as high as 25%
First I put some testimonials as video on my website http://www.ad.com.hr as included video, then I’ve noticed that my traffic is actually getting away because of that high ctr on ads in video.