How can I edit the newspaper video demo side area

Hi,

That is the social counter – https://tagdiv.com/tagdiv-social-counter-plugin/ it comes configured with demo data, but you can configure it to direct to your desired social pages.

You can customize every instance of the social counter element. It can be directly placed while editing with tagDiv composer – http://prntscr.com/nqwozl in this case you can edit the page with the composer and configure it.
Or as a widget in sidebars – http://prntscr.com/nqwpdy in this case you can configure it in Appearance->Widgets in the sidebar where it is placed.

If you have more questions let us know.
Thanks