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Kori Ashton from https://askkori.com helps you learn about Facebook and YouTube Plugins for WordPress –
Facebook Plugins for WordPress:
BestWebSoft's Like & Share – Posts, Pages and Widget Social Extension plugin for WordPress
https://wordpress.org/plugins/facebook-comments-plugin/
YouTube Plugins for WordPress:
http://askkori.com/plugins/25-wordpress-video-plugins/
How to Set Up your YouTube Channel
Premium Video Gallery Plugin