>>99720487
open your watch later page, go in your browser's console and run this
(async function() {
for (let f of document.querySelectorAll("yt-icon-button.dropdown-trigger.style-scope.ytd-menu-renderer")) {
f.click();
let g = document.querySelectorAll("ytd-menu-service-item-renderer");
if (g.length === 6) g[2].click();
await new Promise(resolve => setTimeout(resolve, 1000));
}
})();