https://www.reddit.com/r/uBlockOrigin/wiki/solutions/youtube/#wiki_shorts
! YT Homepage - Hide the Shorts section
youtube.com##[is-shorts]
! YT Menu - Hide the Shorts button
www.youtube.com###guide [title="Shorts"], .ytd-mini-guide-entry-renderer[title="Shorts"]
! YT Search - Hide Shorts
www.youtube.com##ytd-search ytd-video-renderer [overlay-style="SHORTS"]:upward(ytd-video-renderer)
! YT Search and Channels - Hide the Shorts sections
www.youtube.com##ytd-reel-shelf-renderer