YouTube allows users to add comments to videos to share feedback. However, it;'s also possible to disable the comment feature for your videos. This article will explain how to turn off comments for videos published to your YouTube channel.
Connect to your Youtube account and click the Settings button (represented by a cog icon). Then click on Video Manager:
A list of your published videos will be displayed. Choose a video, and click on the small arrow next to the Edit button > Info and Settings:
Next, click on Advanced Settings. Uncheck the Allow comments option:
Click on Save Changes to apply your new settings.
Open the Dashboard. In the left pane, go to Community > Comment Settings:
Scroll to the Default Settings section:
Under the sections labeled On your new videos and On your channel, select Disable comments:
N.B. Instead of disabling comments, you can also choose to moderate them before they are published on your YouTube channel.