Content owners will have the option of offering their content for free or charging viewers. If they ask viewers to pay, Google says it will take a portion of the proceeds to cover its costs. Of course, Google also reserves the right to sell ads to be displayed next to its search results that link to submitted content.
Google says that it has "put a number of measures in place to prevent copying or sharing of your content." It does not specify what those measure are.
The Google Video Uploader software requires Windows 98 or above. There's no Mac or Linux version available at this time.