1. Устанавливаем uBlock Origin или Adblock Plus
uBlock Origin
FireFox: https://addons.mozilla.org/ru/firefox/addon/ublock-origin/
Chrome: https://chrome.google.com/webstore/detail/ublock-origin/cjpa...
Adblock Plus
FireFox: https://addons.mozilla.org/ru/firefox/addon/adblock-plus/
Chrome: https://chrome.google.com/webstore/detail/adblock-plus-free-...
2. Устанавливаем дополнение Tampermonkey
FireFox: https://addons.mozilla.org/ru/firefox/addon/tampermonkey/
Chrome: https://chrome.google.com/webstore/detail/tampermonkey/dhdgf...
3. И добавляем файл RU AdList
4. Добавляем в настройки uBlock Origin. "Параметры > Мои фильтры":
youtube.com##.ytp-ce-covering-overlay
youtube.com##.ytp-ce-element-shadow
youtube.com##.ytp-ce-covering-image
youtube.com##.ytp-ce-expanding-image
youtube.com##.ytp-pause-overlay
youtube.com##.ytp-scroll-min.ytp-pause-overlay
youtube.com##.iv-click-target
youtube.com##.ytp-cards-button
youtube.com##.ytp-cards-teaser
youtube.com##.ytp-ce-covering-image
youtube.com##.ytp-ce-element
youtube.com##.ytp-ce-element.ytp-ce-channel.ytp-ce-channel-this
youtube.com##.ytp-ce-element.ytp-ce-video.ytp-ce-element-show
youtube.com##.ytp-ce-element.ytp-ce-bottom-right-quad.ytp-ce-size-640