codehandling

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Stop. Please Use YouRam Plugin now! 
<a href="https://wordpress.org/plugins/youram-youtube-embed/" rel="ugc">YouRam – YouTube WordPress Plugin</a> 
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Youmax is one of the first YouTube plugins created. Initially this was created for plain HTML websites. After recieving a lot of request from WordPress users, we have launched a free WordPress version here.
Install the plugin and only then check out the <a href="https://codecanyon.net/item/youmax-wp-grow-your-youtube-and-vimeo-business/10065614?ref=codehandling" rel="nofollow ugc">PRO version of Youmax</a>.
Some top features are:
<ul>
<li>YouTube Channel Header + Subscribe button</li>
<li>Video Grid</li>
<li>Tabs for Video Sources</li>
<li>Video Sources inlcude – YouTube Uploads, Playlists, even Vimeo User Videos etc.</li>
<li>Load More button</li>
</ul>

Youtube Video Grid | Youmax

Nice plugin!

Display complete YouTube Channel as a Grid!!

UjW0L

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

Youtube Video Grid | Youmax vs Simple Youtube Widget