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This plugin lets you to display Youtube widget on sidebar with the themes that supports sidebar and Footer
It displays video and playlist of your choice with video id and playlist id. 
It also lets you display all videos from you youtube channel with option to navigate to next nd previous button. 
No google API key needed. Uses Youtube rss feed.
You have choice between single video , playlist and channel.
Note:

Simple Youtube Widget

Plugin that provides users option to display Youtube Widget on the Sidebar or Footer

Krishna Kant Chourasiya

JetixWP Plugins

Small Town Dev, Co.

Really Simple Featured Video plugin provides a really straightforward way of adding featured video support to your Posts, Pages & WooCommerce Products. Adding your own videos to the site is a breeze and you get an easy to use settings panel with the options you really need.
<a href="https://jetixwp.com/plugins/really-simple-featured-video/?utm_source=wporg&utm_medium=referral&utm_campaign=readme" rel="nofollow ugc">🚀 Take a better look at Really Simple Featured Video</a>
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/KWi-xuEgy-o?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
With Really Simple Featured Video you get a metabox at posts, pages, CPTs & Woo products edit screen at the very bottom and a very similar interface as you’re used to with featured image.
You get a really simple settings page which has all the controls you need for managing featured videos throughout your site. Explore it yourself for a better look or take a look at screenshots below.
<h3>👉️ Features</h3>
<ul>
<li>Embed support from Youtube, Dailymotion and Vimeo – You can now embed videos from Youtube, Dailymotion and Vimeo directly at each post/page/product or any custom type that supports featured images.</li>
<li>Autoplay on Hover – Enable autoplay on hover on all videos added via the plugin on the site, self hosted and embeds.</li>
<li>Self host videos – Upload and feature videos on posts/pages and WooCommerce products directly from your site.</li>
<li>WooCommerce Single and Shop Archives Support – A straightforward implementation for WooCommerce Product Featured Video.</li>
<li>Floating Videos – Create engaging, responsive floating video buttons that open a popup player with multi-video support and customizable controls.</li>
<li>Astra Pro WooCommerce Module Support – Support for vertical and horizontal product galleries.</li>
<li>Salient Theme WPBakery Builder Support – Support for Post Loop Builder element with Salient theme.</li>
<li>Elementor Pro Support – Support for Posts/Archive, WooCommerce Product widgets with Elementor Pro builder.</li>
<li>Bricks Builder Support – Support for Posts/Archive with Bricks builder using custom widget elements.</li>
<li>Support for Core themes – We support all the newer core themes such as TwentyTwenty Four to Classic themes.</li>
<li>Video Controls such as Autoplay, Mute and more – Manage everything for the featured videos, by setting them accordingly, options for these are available at settings page.</li>
<li>Shortcodes – Shortcodes to embed featured video at any post, page or product you want.</li>
<li>Manage Featured Videos – Manage featured videos from one single place for all your post types and skip the repetitive steps of going to the edit screen to edit each post/page/product individually.</li>
<li>Elementor Widget – A dedicated Featured Video widget for Elementor that seamlessly integrates with your page designs, allowing easy video embedding and customization.</li>
</ul>
<h3>👉️ Video Autoplay on Hover Support</h3>
RSFV supports autoplaying videos on hover, just enable the feature via Settings and the videos will start to autoplay. Autoplay videos when users hover on them not by default, creating a much better experience for the user as well as the site.
<h3>👉️ WooCommerce Support</h3>
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/FLw3ntOXaLY?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
This plugin came out of a real need with many plugins available out there yet none provides a good integration with WooCommerce. 
Really Simple Featured Video plugin provides a straightforward implementation for WooCommerce Product Featured Video, with which your set featured video loads directly into product thumbnails along with any other product images.
<h3>👉️ Astra Pro WooCommerce Module Support</h3>
RSFV supports Astra Pro WooCommerce module with horizontal and vertical product gallery types, which in turn brings you more control and customizable features.
<h3>👉️ Salient Theme WPBakery Builder Support</h3>
RSFV supports Salient Theme WPBakery builder with its Post Loop Builder element, giving you more control and support for Custom post loops. You can also display Featured Video on single pages via the shortcode – [rsfv].
<h3>👉️ Elementor Pro Builder Support</h3>
RSFV supports Elementor Pro builder with its Posts/Archives and WooCommerce Product widgets, you can use them to display Featured Videos for posts, pages, products and CPTs (with Featured Images). You can also display Featured Video on single pages via the shortcode – [rsfv]
<h3>👉️ How to use Shortcodes</h3>
There are also shortcodes to embed featured video at any post, page or product you want.
[rsfv] shortcode is for displaying set featured video of the individual post anywhere in the post.
[rsfv_by_postid] shortcode is for displaying featured video of any post anywhere you want, you just need to pass a vaild post id to it e.g. [rsfv_by_postid post_id=”281″]
You can send a feedback or a feature request at <a href="https://github.com/JetixWP/really-simple-featured-video" rel="nofollow ugc">github.com/JetixWP/really-simple-featured-video</a> Or create a thread at forums here, in any case.
<h3>👉️ Premium Features</h3>
Really Simple Featured Video PRO plugin supports additional features, where we can continue to keep them maintained and updated. 
We get quite a few requests from you guys, and the plugin offers most if not all features from these requests while we continuously work towards adding more and more useful features.
RSFV PRO plugin includes these features –
<ul>
<li>✅ Extended Autoplay on Hover – Customize the way video autoplay on hover works on your site all via the plugin settings.</li>
<li>✅ Extended Floating Videos – More layouts to display floating videos sitewide.</li>
<li>✅ Change Video Aspect Ratio – Apply sitewide featured video aspect ratio such as 16:9, 3:2, 1:1 and more.</li>
<li>✅ Change Video Order at Woo Product CPT – Set video order at single product pages of WooCommerce Product CPT.</li>
<li>✅ Support for more Premium/Custom Themes – Loads additional compatibility for many supported Premium/Custom themes.</li>
<li>✅ Requests for Theme Compatibility – We will take requests for additional theme compatibility.</li>
<li>✅ Priority Support – Solving your problems are our priority with superfast response times.</li>
</ul>
More features to come in the future, to name a few –
<ul>
<li>✨ Featured Video Blocks for Full Site Editing</li>
<li>✨ And more from your requests</li>
</ul>
If you wish to grab the PRO version with a lifetime deal please do <a href="https://jetixwp.com/plugins/really-simple-featured-video/?utm_source=wporg&utm_medium=referral&utm_campaign=readme" rel="nofollow ugc">checkout Pro at our website</a>

Really Simple Featured Video – Featured Video Support for Posts, Pages & WooCommerce Products

Really Simple Featured Video enables featured video support for WordPress posts, pages, CPTs (with featured images) & WooCommerce Products.

Simple Youtube Widget vs Really Simple Featured Video – Featured Video Support for Posts, Pages & WooCommerce Products