Userscript for removing the suggestions on youtube. Useful if you use youtube on a vertical monitor.

remove-video-suggestions.js

// ==UserScript==
// @name        Remove suggestions YouTube
// @namespace   Violentmonkey Scripts
// @include     *://*.youtube.com/*
// @grant       GM_addStyle
// @run-at      document-idle
// @author      Null (r4v10l1)
// ==/UserScript==

GM_addStyle (`
  #secondary {
    width: 100%;
  }
  #comments {
    display: none;
  }
  ytd-watch-flexy[flexy] #secondary.ytd-watch-flexy {
	width: 100% !important;
}
`)

function checkShit(cdelay) {
  if (document.getElementById("primary-inner") != null) {
    console.log("[YTCleaner] Found primary-inner...");
    move("secondary", "primary-inner");
  } else {
    console.log("[YTCleaner] Can't find primary inner...")
    setTimeout(function(){ checkShit(cdelay); }, cdelay);  
  }
}

function move(source, target) {
  var source_e = document.getElementById(source);
  var target_e = document.getElementById(target);

  target_e.appendChild(source_e);
}

var DELAY = 500;   // ms
console.log("[YTCleaner] Started...")
setTimeout(function(){ checkShit(DELAY); }, 500);

UPDATE: Replaces comments for video suggestions.