Apologies to anyone from when I posted my ublock origin filters earlier, please use this corrected on since the previous one wasn't specific enough and caused it to pick up the avatars in the notification dropdown too
! block the avatar that appears to the left of the chat box once you start typing and shifts everything over and annoys me
www.youtube.com##
div.yt-live-chat-message-input-renderer yt-img-shadow[id="avatar"]