If you don’t like the new design of YouTube, you can download an extension and change the layout back to how it once was. And it’s very easy to do.
The extension is called “YouTube Redux” and is available for Mozilla Firefox and Chromium browsers like Chrome, Edge or Brave.
With the extension, you can get almost get the same look and feel of the old pre material design YouTube.
The addon is still being updated to keep it working well.
If you have Mozilla Firefox, you can download it from here: https://addons.mozilla.org/en-US/firefox/addon/youtube-redux/
If you use Google Chrome or Microsoft Edge or other Chromium browsers, you can download it from here: https://chrome.google.com/webstore/detail/youtube-redux/mdgdgieddpndgjlmeblhjgljejejkikf/related