How to Block Youtube Recommendations in 2021
Step 1: Install Adblock Plus.
Step 2: Go to a youtube video and then click on the Adblock button in your taskbar.
Step 3: Click on "Block Specific Element on this Website" and hover over what to block.
Step 4: You will want to block the elements listed below, if you can't hover over them you can go to the Adblock Advanced settings where you can block them manually.
Blocking the elements below will ensure that you do not see recommended videos in the side bar anymore, and also you will not see recommended videos on your youtube homepage. However, you will still be able to see your subscriptions feed videos when you click on "Subscriptions". You will still be able to discover new videos by clicking "Discover", search for videos, all other functionality is the same.