disabling (or hiding) comments is a cinch. To do so, hover over the video and click on the “Hide comments and reaction button”. The comments will now be turned off so you can concentrate on the live stream itself.
Alter your default commenting options by following these easy steps:
1)To use YouTube Studio, you must first log in.
2)Select Settings from the left menu.
3)Choose a neighborhood. Defaults.
4)Choose your default options: If you do have the Community tab, you can do the following: Under "Comments on your channel," select your default settings...
5)Select the Save option.