ThirtyBees module for adding videos to your product (shows up in a product tab)
This ties into the displayProductTabContent hook to automatically display as a tab on the page of a product.
It is expected that you will override hookDisplayProductTabContent.tpl to make it how your theme expects tabs
If you do not want the video to be in a tab, you just need to go into the module configuration page and disable the product tab hook.
You will then be able to use {hook h='displayProductVideos' product=$product} in your theme to get the product videos anywhere in your product.tpl file in your theme.
If you are using the displayProductVideos hook, then you can override the hookDisplayProductVideos.tpl file in your theme to customize that output.
In the back office when you edit a product you will see a new tab on the left called "Product Videos" in that tab you will be able to add and remove videos based on their URL.
Currently this module does not support uploading videos. Only URLs such as YouTube, and Vimeo.