You can add video to product page in Magento below the product name. More importantly, you can do so without using any extension. This can be done by adding some code to the following file.
app/design/frontend/yourpackage/yourtheme/template/catalog/product/view.phtml
For more changes, see the tutorial: http://www.demagento.com/how-to-add-magento-product-video-programmatically/
