Automatic skip-ad and hide ad elements in youtube without use AD-Block, this script don't remove AD-Elements, just hide from page.

YoutubeSkipAd.user.js

// ==UserScript==
// @name         YoutubeSkipAd
// @version      1.6.3
// @description  Automatic skip-ad and hide in youtube.
// @author       FRNathan13
// @include      /(http|https):\/\/www.youtube.com\/(.*)
// @grant        none
// ==/UserScript==

(function() {
    setInterval(function() {
        var overlay_close_button = document.querySelector('.ytp-ad-overlay-close-button');

        if(overlay_close_button != undefined){
            overlay_close_button.click();
            console.log("[YOUTUBE-AD] Element '.ytp-ad-overlay-close-button' hidden.");
        }

        var ad_skip_button = document.querySelector('.ytp-ad-skip-button.ytp-button');

        if(ad_skip_button != undefined) {
            ad_skip_button.click();
            console.info("[YOUTUBE-AD] Ad button '.ytp-ad-skip-button.ytp-button' clicked.");
        }

        var google_companion_ad_div = document.querySelector('#google_companion_ad_div')

        if(google_companion_ad_div != undefined && google_companion_ad_div.style.display != 'none') {
            google_companion_ad_div.style.display = 'none';
            console.info("[YOUTUBE-AD] Element '#google_companion_ad_div' hidden.");
        }

        var container_iframe = document.querySelector("#container > iframe");

        if(container_iframe != undefined && container_iframe.style.display != 'none') {
            container_iframe.style.display = 'none';
            console.info("[YOUTUBE-AD] Container Element '#container > iframe' hidden.");
        }

        document.querySelectorAll('.style-scope.ytd-action-companion-ad-renderer')
        	.forEach(e => { e.style.display = 'none' });

        var player_ads = document.querySelector('#player-ads');

        if(player_ads != undefined && player_ads.style.display != 'none') {
        	player_ads.style.display = 'none';
            console.info("[YOUTUBE-AD] Element '#player-ads' hidden.");
        }

        var ad_skip_text = document.querySelector('.ytp-ad-text.ytp-ad-skip-button-text');

        if(ad_skip_text != undefined){
            ad_skip_text.click();
            console.log("[YOUTUBE-AD] Ad button '.ad_skip_text' clicked.");
        }
    }, 0.25);
})();