Title:

Enter a title for the video.

Description:

It allows you to add a description

Video code:

Copy the code from youtube videos and paste in this line.

Shortcode:

Allows to display widget anywhere on the page. Copy this code. Then, open the edit menu of the page into which you wish to place the widget. Paste the code you copied into the contents of the page.

Widget logic:

Allows to control the pages that the widget will appear on. More about this feature in https://wordpress.org/plugins/widget-logic/other_notes/.