This plugin will grab your watch history as far back as it can go, and offer you to download it locally in json format. This is done by installing the plugin, going to https://www.youtube.com/feed/history and pressing the Get history button at the top of the page, the plugin will then scroll until it can't scroll anymore (should be around a year back) and save every video title, url and thumbnail url into a json file. If you feel the plugin is taking too long between each scroll, then you can change the timing by entering a time in ms (milliseconds) that you want to use instead.
