I cannot edit or delete a demo widget (Videomag theme)

Hi. I for some reason don’t have the option to remove this widget.

I can go to “posts” and edit the body of it, but I cannot edit the “added by” (which is what I want to change), nor can I complete get rid of the widget because I do not see it under widgets. Can anyone help me?

How to contact an author to get support or for any technical query:

Please contact author, theme author will assist you.