YouTube is a video sharing site that is one of the largest video websites in the world. With over a billion monthly visitors, it is also one of the most visited websites in the world. 

It offers users a platform to upload videos and interact with others. It offers a feature that allows users to leave a comment on videos that they watch. This feature allows them to express their opinions, but it also allows users to express negative opinions. Some videos will be marked as disliked by its viewers. This mark is intended to mean that the user does not like the video. The main purpose of this tool is to restore the dislike feature, which was recently removed from the YouTube website.