Mdkart

This plugin for WordPress automatically add the rel=”lightbox[ID-OF-THE-POST]” to images linked in a post 
ID-OF-THE-POST is unique per post so all images per post are grouped in one lightbox set. 
Works also with the gallery Fonction of WP 2.7 and in comments
Doesn’t add the the files required for Lightbox (it only add the rel lightbox tag)! You have to insert yourself in your theme the required files or use a plugin like Lightbox 2 WordPress Plugin or Lightbox 2.3 plugin for WordPress
<h3>Changelog / Todo</h3>
0.4.1 
* Optimizing the code 
0.4 
* Now Compatible with the Gallery Fonction of WP 2.7 
* Adds also rel tag in the comments 
0.3 
* Correction of a bug that added rel tag on links done on img tags. 
0.2 
* Correction of a small bug described by Kristof Mattei. Thanks to him for the help!
Thanks to all who sent bug reports and ideas for improvements. 
Please send me a mail if I forgot you to mention here.

Add Lightbox

This plugin for Wordpress automatically add the rel="lightbox[ID-OF-THE-POST]" to images linked in a post

Sutherland Boswell

RefactoredCo

Easily define all the video sources you like to post on your WordPress blog and let Video Importer take care of the rest. In addition to importing past videos when you create a new source, Video Importer will check your sources for any new videos once per hour.
Adding a new source isn’t just easy, it’s also flexible enough to meet your needs. Choose between YouTube or Vimeo, choosing the type of feed, and then entering the username or ID. You can also set the post type, add categories and tags, choose the author and more for each source you’re importing.
Works with:
YouTube
<ul>
<li>User Uploads</li>
<li>Playlists (limited support)</li>
</ul>
Vimeo
<ul>
<li>User Uploads</li>
<li>Groups</li>
<li>Channels</li>
</ul>
<h4>Video Importer Pro</h4>
Development of <a href="https://refactored.co/plugins/video-importer" rel="nofollow ugc">Video Importer Pro</a> is underway! Buy today and get access to all the new features as they become available.
<h4>Video Thumbnails</h4>
Fully compatible with our <a href="https://refactored.co/plugins/video-thumbnails" rel="nofollow ugc">Video Thumbnails</a> plugin.

Video Importer

I tried and tested a couple of YouTube video import plugins and none of them actually worked and none of them did what I wanted it to do. Which is just importing YouTube videos as they get published into specified categories.

Except for this plugin. This plugin did exactly what I wanted it to do and it works great!

So well done to you! 

Great plugin that actually works

Save time and hassle by automatically importing videos from your favorite sources on YouTube and Vimeo directly into your WordPress blog.

Add Lightbox vs Video Importer