script.js

const sleep = ms => new Promise(r => setTimeout(r, ms));

(async function clearWatchLater() {
    let removed = 0;

    console.log("Cleaning Watch Later...");

    while (true) {
        const btn = document.querySelector(
            '#primary ytd-playlist-video-renderer yt-icon-button.dropdown-trigger'
        );

        if (!btn) {
            console.log(`Done! Removed ${removed} videos.`);
            break;
        }

        btn.click();
        await sleep(300);

        const items = document.querySelectorAll(
            'tp-yt-iron-dropdown [role="menuitem"], ytd-menu-service-item-renderer'
        );

        let found = false;

        for (const item of items) {
            if (item.textContent.includes("Remove from")) {
                item.click();
                removed++;
                found = true;
                console.log(`Removed: ${removed}`);
                break;
            }
        }

        if (!found) {
            console.log("Remove option not found, scrolling.");
            window.scrollBy(0, 100);
        }

        await sleep(500);
    }
})();