A new survey by The New York Times shows that broadcast TV viewership appears to be waning generationally.

The study, released to Mashable, reports that roughly one in three Millennials watches less TV than online videos, or no TV at all. At the same time, 50% of surveyed 18- to 34-year-olds report watching video online at least once a day.

34% of surveyed millennials reported watching mostly online video or no broadcast TV, as opposed to equal amounts of TV and online video or only TV. Only 20% of Generation Xers and 10% of Baby Boomers reported the same preference for online videos.

Another blow for broadcast: 25% of online video viewers are watching less TV than they were a year ago, the survey reports.

When asked why they're watching more online video, 56% of Millennials said they could access what they wanted immediately, while 49% said they like being able to watch multiple episodes online. Another 44% said mobile devices allow video viewing in places and at times they can't with traditional TV.

The study also showed an increase in online video viewership. Of people who watch videos online, 84% reported watching the same amount or more than they did last year.

The study shows that online video viewers make online watching a habit. Fifty percent of Millennials who watch online videos said they did so at least once a day, and 89% reported watching online video at least weekly. 45% of Generation X and 36% of Boomer online video watchers tune in one or more times a day.

While watching online video seems to be a growing pastime, there are still reasons some prefer more traditional television. The top reasons people watch TV: The screen size is better, it's more comfortable and it's better to watch with a group.

Watching online video also has its perks. When asked for reasons they watch, online video viewers cited immediate access, a customized experience and the ability to share with others.

The Times presented the research at the International News Media Association's Audience Summit in Las Vegas Thursday.

Do you prefer to watch broadcast TV or videos online? Let us know in the comments, below.

Images: Flickr, Doug Belshaw; The New York Times