These steps are required to tweak here!
Make sure you install an ad blocker extension like uBlock Origin or AdGuard so it will remove ads completely.
Recommended scripts and styles to install here (Make sure you install Stylus extension to do this).
CPU Tamer by AnimationFrame - https://greasyfork.org/en/scripts/431573
Simple Age Restriction Bypass - https://greasyfork.org/en/scripts/423851
Anti-Shorts script - https://github.com/YukisCoffee/yt-anti-shorts/blob/main/anti-shorts.user.js
YouTube tweaks for uBlock Origin - https://pastebin.com/0Qtubr5M
Bonus scripts to install (if users have older computers).
Hide VP9 support from YouTube - https://greasyfork.org/en/scripts/373685
Disable YouTube 60 FPS (Force 30 FPS) - https://greasyfork.org/en/scripts/23329
To improve more performance, Just turn off "keep hovering to play" popup. Instructions here.