mateusz.adamus

Adds shortcodes to show YouTube channel’s subscribers and video views count. For both shortcodes YouTube Channel ID and YouTube API Key is needed.
For performance reasons the data is refreshed once every 12 hours. This can be modified with “timeout” parameter (value in hours).
Shortcodes are as follows:
<ul>
<li>youtube_views_count – for channel video views count</li>
<li>youtube_subscribers_count – for channel subscribers count</li>
</ul>
Parameters are as follows:
<ul>
<li>id – YouTube channel ID (How to get YouTube channel ID? https://support.google.com/youtube/answer/3250431?hl=en)</li>
<li>key – YouTube API key for browser (How to get YouTube API key? https://developers.google.com/youtube/registering_an_application#Create_API_Keys)</li>
<li>timeout – cache timeout (value in hours) /default is 12 hours/</li>
</ul>
For example:
<ul>
<li>[youtube_views_count id=’YOUR_CHANNEL_ID’ key=’YOUR_API_KEY’]</li>
<li>[youtube_views_count id=’YOUR_CHANNEL_ID’ key=’YOUR_API_KEY’ timeout=’1′]</li>
</ul>

WP YouTube Counters

Adds shortcodes to show YouTube channel's subscribers and video views count.

viperchill

ViperBar adds an attractive bar to your site header, which you can use to increase blog or newsletter subscribers. It includes built in styling, Aweber & Feedburner integration, conversion rate tracking, split-testing, themes, and much more.
<a href="http://www.viperchill.com/" rel="nofollow ugc">ViperChill</a>, a blog on Viral Marketing, is the creator of this plugin. If you want to take your blog to the next level, you should read this post on <a href="http://www.viperchill.com/wordpress-seo/" rel="nofollow ugc">WordPress SEO</a>.
<h3>Donations</h3>
You may make donations at http://www.viperchill.com

ViperBar

ViperBar adds an attractive bar to your site header, which you can use to increase blog or newsletter subscribers.

WP YouTube Counters vs ViperBar