Script to delete your YouTube comment history.
Navigate to https://www.youtube.com/feed/history/comment_history and then open the JavaScript console, and paste the entire script from "script.js"
You can also add the Erasure Chrome extension: https://chrome.google.com/webstore/detail/erasure/lkhceldiinefjkocccdmpgheheeddfmb?hl=en-US
Update 1.4
Now deletes comments on private videos.