Open YouTube and sign in to your account
Go to the comment you want to remove
Click the three dots next to your comment
Select Delete
Confirm the deletion if prompted
To remove multiple comments, open YouTube History
Select Comments
Find the comment you want to delete
Click the three dots next to it
Select Delete
To delete comments on your own video, open YouTube Studio
Go to Comments
Find the comment
Click the three dots
Select Remove or Hide user from channel if needed
To delete a comment on mobile, open the YouTube app
Tap your profile picture
Go to Your data in YouTube or History if available
Find the comment
Tap the three dots
Select Delete
If you want to remove all comments you made, delete them one by one from your comment history