WooDev

Product Video Showcase for WooCommerce allows you to add video previews to your WooCommerce products. When customers hover over a product image, they’ll see a video preview, giving them a better understanding of the product.
Features: 
* Support for YouTube, Vimeo, and direct video URLs 
* Customizable video fit options 
* Easy to use interface in the product editor 
* Responsive design
<h4>Learn More</h4>
Visit <a href="https://woodev.net/" rel="nofollow ugc">woodev.net</a> to learn more about us discover how it can take your website’s user engagement to the next level.
<h3>How to Use</h3>
To add a video preview to a product:
<ol>
<li>Go to Products > All Products in your WordPress admin panel</li>
<li>Edit the product you want to add a video to</li>
<li>In the product data meta box, click on the “General” tab</li>
<li>Scroll down to find the “Product Video URL” field</li>
<li>Enter the URL of your YouTube, Vimeo, or directly hosted video</li>
<li>(Optional) Choose a “Video Fit” option to control how the video displays</li>
<li>Update or publish your product</li>
</ol>
The video will now appear when customers hover over the product image in your shop.

Product Video Showcase for WooCommerce

Enables dynamic video previews on product hover in WooCommerce shop pages.

Christopher Finke

Inline Preview is a plugin for WordPress that adds a live preview of the current post next to the post editor instead of opening the preview in a new tab.
Problem: When creating a post in WordPress, previewing your post in a separate tab can be slow and/or complicated.
Solution: Show the preview right next to the editor.
It’s just an idea I’m playing with for streamlining the post creation process, and if it feels familiar, it’s probably because it is: through version 2.1, WordPress contained a preview iframe at the bottom of the post editing screen, but this is a more elegant implementation.

Inline Preview

Inline Preview adds a preview of the post you're writing next to the editor when you click Preview (instead of opening it in a new tab).

Product Video Showcase for WooCommerce vs Inline Preview