Remove youtube 'shorts' video type from your feed/subscriptions page.

shorts-remover.user.js

// ==UserScript==
// @name         Shorts Blocker
// @version      0.1
// @description  Remove all 'shorts' video kind from youtube feed/subscriptions page.
// @match        https://www.youtube.com/feed/subscriptions
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @grant        none
// ==/UserScript==

(() => {
    'use strict';

    function expandParent(node, index) {
        if (index > 0) return expandParent(node.parentElement, index - 1);
        return node;
    }

    window.timers = window.timers || {};
    window.timers.SHORTS_REMOVER_TIMER_ID = setInterval(() => {
        try {
            for (let node of document.querySelectorAll('ytd-thumbnail-overlay-time-status-renderer[overlay-style="SHORTS"]')) {
                //node.parentElement.parentElement.parentElement.parentElement.parentElement.remove()
                var el = expandParent(node, 5);
                el.remove();
                console.log('removed short video from feed.');
            }
        }
        catch (e) {

        }
    }, 1);
})();