Nazmul Hasan Robin

This plugin allows you to show youtube subscribe button anywhere in your website using widget.
Major features in Social Subscribe – Follow Buttons include:
<ul>
<li>Shows youtube subscribe button</li>
<li>Shows youtube subscribers count </li>
<li>Settings from backend to change design </li>
<li>Available in widgets </li>
<li>Other Social Networking Site’s buttons are coming soon!</li>
</ul>

Social Subscribe – Follow Buttons

This plugin provides a widget to show a youtube subscribe button. Also number of youtube subscribers can be displayed.

Apsara Aruna

This is simple widget of showing youtube subscribe button. Easy to use. Previously Youtube Subscribe Button Widget
<iframe loading="lazy" class="youtube-player" width="560" height="315" src="https://www.youtube.com/embed/5xJLO9SEC94?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>
Features 
*Enable or Disable Full Layout. 
*Show or hide subscriber count.
Also see my other plugins 
* <a href="https://wordpress.org/plugins/embed-page-facebook/" title="Embed Page Facebook" rel="ugc">Embed Page Facebook</a> 
* <a href="https://wordpress.org/plugins/social-link-on-footer/" title="Social Link on Footer" rel="ugc">Social Link on Footer</a> 
* <a href="https://wordpress.org/plugins/social-profile-link/" title="Social Profiles Link" rel="ugc">Social Profiles Link</a>
<a href="https://apsaraaruna.com" title="Official website" rel="nofollow ugc">Official website</a>

Easy Subscribe Button Widget

This is widget of showing youtube subscribe button. Previously Youtube Subscribe Button Widget.

Social Subscribe – Follow Buttons vs Easy Subscribe Button Widget