You will be prompted to install the Veoh Web Player when you try and watch a video over 30 minutes.

Or you can install from the Veoh Web Player download page at any time.
In Internet Explorer, select the Run button in the pop-up dialog. If you’re using Firefox, click the Save File button, and then open the setup file from the Downloads list and the installation will begin.
To install Veoh Web Player for Mac, do the following:
After you've downloaded the installer, double-click on the VeohWebClient.dmg.
Accept the End User License Agreement.
Drag the Veoh Web Client to your Applications folder.
You will be prompted to close your browser. Click Close.
Then launch Veoh Web Player from your Applications folder or by clicking on VeohWebClient.
When prompted to login, do so using your Veoh username and password. After you’ve installed Veoh Web Player, your browser will re-open to Veoh.com where you can discover and watch more videos that interest you.