YouTube

<script src="https://apis.google.com/js/platform.js"></script>

<div class="g-ytsubscribe" data-channelid="YOUR-CHANNEL-ID" data-layout="full" data-theme="dark" data-count="default"></div>

Facebook

Step 1: Include the JavaScript SDK on your page once, ideally right after the opening body tag.

<div id="fb-root"></div>
<script async defer crossorigin="anonymous" src="https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v20.0" nonce="Sjkiygze"></script>

Step 2: Place this code wherever you want the plugin to appear on your page.

<div class="fb-like" data-href="https://www.facebook.com/YOUR-PAGE" data-width="" data-layout="" data-action="" data-size="" data-share="true"></div>