Republican vice presidential candidate Sarah Palin, left, is shown in this image taken from television with Saturday

New York ? More people are checking out Tina Fey’s Sarah Palin impersonations Saturday night later than Saturday night live.

Fey’s dead-on take of the Republican vice presidential candidate is not just the pop-culture event of the campaign season. It is a landmark in how people watch television, a peek into the future of a new media world.

Only one-third of the people who have seen at least one of the skits watched it first live on “Saturday Night Live.” More people have checked them out online or, to a lesser extent, watched later on a digital video recorder or through video on demand, according to Integrated Media Measurement Inc., a research firm that measures media exposure through a person’s mobile phone.

The company has never seen anything expand its reach beyond the first-run broadcast quite to this extent.

“I don’t know if we would have seen this sort of viral activity a year ago, if people didn’t think of their computer as a place to turn to for video entertainment,” said Amanda Welsh, IMMI’s head of research. “I really believe that we are seeing a change in consumer behavior on a very profound level.”

Rather than jealously guard Fey’s skits for live TV, NBC has actively encouraged the activity.

There were 10.2 million people watching the season-opening “Saturday Night Live” when Fey first appeared as Palin, with Amy Poehler portraying Hillary Clinton, according to Nielsen Media Research. These days, that’s a good-sized audience for prime-time, let alone late-night, TV.

Another 1.2 million people captured the episode on their DVRs and watched within the week. Through the middle of last week, NBC estimated that it had streamed the skit online more than 13 million times. Those are just the numbers NBC can keep track of; the skit was undoubtedly captured and posted or e-mailed many more times.

NBC perfected “widget” technology only a few months ago, allowing video of its material to be captured across the Internet while retaining a tie to the network’s Web site. It has aggressively marketed the Fey skits to political and comedy blogs. Her skits are posted on NBC’s Web site almost immediately after they air on the East Coast – a fan in California can see them online before it’s on TV.

The idea is to create buzz; if people see the clips online they might find them funny and tune in to “Saturday Night Live” regularly, said Vivi Zigler, president of NBC Universal digital entertainment, owned by the General Electric Co. Lapsed viewers might return, or even people who have never seen the show might watch, she said.

The danger to this approach is that more viewers might decide not to watch “Saturday Night Live” on Saturday night, and advertising revenue could suffer. So far the opposite is true: The show’s audience for its first three episodes is 49 percent higher than last year’s.

The experts expect that pattern to continue. “The more platforms you make available to consumers, the more consumers you capture,” Welsh said.

This weekend’s appearance by Palin herself led “Saturday Night Live” to its highest mark in overnight Nielsen Media Research ratings since March 1994, when assaulted skater Nancy Kerrigan was guest host.

Although a complete audience estimate for the rest of the country won’t be available until later in the week, it is likely to be around 14 million.

For the first half-hour, when Palin first came out, the audience was about 17 million. The week before, only two other shows in prime time had a bigger audience, Nielsen said.