x414i

X414i Feed for YouTube displays the latest public videos from a YouTube channel via the official YouTube RSS feed. Add a default channel in the plugin settings, then place the shortcode in any post, page, or widget area that supports shortcodes.
<h3>Shortcode</h3>
Basic usage:
<pre><code>[x414iyf_youtube_latest]
</code></pre>
Custom channel and limit:
<pre><code>[x414iyf_youtube_latest channel="@username" limit="3"]
</code></pre>
Available shortcode attributes:
<ul>
<li><code>channel</code> – YouTube channel ID, channel URL, or handle.</li>
<li><code>limit</code> – Number of videos to display.</li>
<li><code>template</code> – Display template: <code>card</code>, <code>list</code>, or <code>overlay</code>.</li>
</ul>

X414i Feed for YouTube

Display the latest YouTube videos from a channel using the public RSS feed, with no API key required.

alaingg

Simple plugin that allows to include the images into your wordpress rss, rss2. 
The plugin use the post/page thumbnail or the firt attached image to the post/page gallery. viste the <a href="http://web-argument.com/2008/11/09/wp-rss-images-wordpress-plugin/" rel="nofollow ugc">plugin page</a> for details.

X414i Feed for YouTube vs WP RSS Images