By looking at other social networking widgets, YouTube has also enabled its users to embed YouTube channels 'Subscribe' button to websites or blogs with less effort.
How to Embed YouTube Channel Subscribe Button to a Blog?
<script src="https://apis.google.com/js/plusone.js"></script>
<div data-channel="Your Channel Name Here">
</div>*Copy above code and replace "Your Channel Name Here" with the name of your YouTube channel and paste it anywhere on the blog with the help of Text Widget.
[Source: YouTube Blog]
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