There's certainly no shortage of online video sharing sites, but other than YouTube, few are finding much success and many are expected to exit the space before the end of the year.

That's the conclusion of an Investors Business Daily article that examines the status of much-hyped online video sites with major content deals such as Joost and Revver, as well as smaller struggling sites like Veoh and

Part of the problem-industry copyright lawsuits. With major labels demanding upfront payments as high as $30 million, many venture capital-backed upstarts just couldn't compete.

"It's become more difficult to obtain premium content," says Heather Dougherty from Internet tracking firm Hitwise in the story.