diff --git a/assets/css/default.css b/assets/css/default.css
index 00881253..c827a8a9 100644
--- a/assets/css/default.css
+++ b/assets/css/default.css
@@ -83,8 +83,8 @@ body a.channel-owner {
 
 .creator-heart-container {
   display: inline-block;
-  padding: 0px 7px 6px 0px;
-  margin: 0px -7px -4px 0px;
+  padding: 0 7px 6px 0;
+  margin: 0 -7px -4px 0;
 }
 
 .creator-heart {
@@ -98,7 +98,7 @@ body a.channel-owner {
 .creator-heart-background-hearted {
   width: 16px;
   height: 16px;
-  padding: 0px;
+  padding: 0;
   position: relative;
 }
 
@@ -142,6 +142,12 @@ div {
   animation: spin 2s linear infinite;
 }
 
+@media screen and (prefers-reduced-motion: reduce) {
+  .loading {
+    animation: none;
+  }
+}
+
 .playlist-restricted {
   height: 20em;
   padding-right: 10px;
diff --git a/assets/css/player.css b/assets/css/player.css
index 50c7a748..7864be9b 100644
--- a/assets/css/player.css
+++ b/assets/css/player.css
@@ -207,9 +207,9 @@ ul.vjs-menu-content::-webkit-scrollbar {
 }
 
 .video-js .vjs-time-divider {
-  min-width: 0px;
-  padding-left: 0px;
-  padding-right: 0px;
+  min-width: 0;
+  padding-left: 0;
+  padding-right: 0;
 }
 
 .video-js .vjs-poster {
diff --git a/assets/js/_helpers.js b/assets/js/_helpers.js
index 8e18169e..9f79eb6a 100644
--- a/assets/js/_helpers.js
+++ b/assets/js/_helpers.js
@@ -147,7 +147,7 @@ window.helpers = window.helpers || {
      * @param {callbackXhrError} [callbacks.onError]
      * @param {callbackXhrError} [callbacks.onTotalFail] - if failed after all retries
      */
-     xhr: function(method, url, options, callbacks) {
+    xhr: function(method, url, options, callbacks) {
         if (!options.retries || options.retries <= 1) {
             helpers._xhr(method, url, options, callbacks);
             return;
@@ -202,7 +202,7 @@ window.helpers = window.helpers || {
         if (localStorageIsUsable) {
             return {
                 get: function (key) {
-                    let storageItem = localStorage.getItem(key)
+                    let storageItem = localStorage.getItem(key);
                     if (!storageItem) return;
                     try {
                         return JSON.parse(decodeURIComponent(storageItem));
@@ -211,9 +211,9 @@ window.helpers = window.helpers || {
                         helpers.storage.remove(key);
                     }
                 },
-                set: function (key, value) { 
-                    let encoded_value = encodeURIComponent(JSON.stringify(value))
-                    localStorage.setItem(key, encoded_value); 
+                set: function (key, value) {
+                    let encoded_value = encodeURIComponent(JSON.stringify(value));
+                    localStorage.setItem(key, encoded_value);
                 },
                 remove: function (key) { localStorage.removeItem(key); }
             };
diff --git a/assets/js/comments.js b/assets/js/comments.js
index 35ffa96e..f969b508 100644
--- a/assets/js/comments.js
+++ b/assets/js/comments.js
@@ -4,7 +4,7 @@ var spinnerHTML = '<h3 style="text-align:center"><div class="loading"><i class="
 var spinnerHTMLwithHR = spinnerHTML + '<hr>';
 
 String.prototype.supplant = function (o) {
-    return this.replace(/{([^{}]*)}/g, function (a, b) {
+    return this.replace(/\{([^{}]*)\}/g, function (a, b) {
         var r = o[b];
         return typeof r === 'string' || typeof r === 'number' ? r : a;
     });
@@ -58,14 +58,14 @@ function get_youtube_comments() {
     var fallback = comments.innerHTML;
     comments.innerHTML = spinnerHTML;
 
-    var baseUrl = video_data.base_url || '/api/v1/comments/'+ video_data.id
+    var baseUrl = video_data.base_url || '/api/v1/comments/'+ video_data.id;
     var url = baseUrl +
         '?format=html' +
         '&hl=' + video_data.preferences.locale +
         '&thin_mode=' + video_data.preferences.thin_mode;
 
     if (video_data.ucid) {
-        url += '&ucid=' + video_data.ucid
+        url += '&ucid=' + video_data.ucid;
     }
 
     var onNon200 = function (xhr) { comments.innerHTML = fallback; };
@@ -81,17 +81,17 @@ function get_youtube_comments() {
                     {commentsText}  \
                 </h3> \
                 <b> \
-                '
-                if (video_data.support_reddit) {
-                    commentInnerHtml += ' <a href="javascript:void(0)" data-comments="reddit"> \
+                ';
+            if (video_data.support_reddit) {
+                commentInnerHtml += ' <a href="javascript:void(0)" data-comments="reddit"> \
                         {redditComments} \
                     </a> \
-                    '
-                }
-                commentInnerHtml += ' </b> \
+                    ';
+            }
+            commentInnerHtml += ' </b> \
             </div> \
             <div>{contentHtml}</div> \
-            <hr>'
+            <hr>';
             commentInnerHtml = commentInnerHtml.supplant({
                 contentHtml: response.contentHtml,
                 redditComments: video_data.reddit_comments_text,
@@ -125,7 +125,7 @@ function get_youtube_replies(target, load_more, load_replies) {
     var body = target.parentNode.parentNode;
     var fallback = body.innerHTML;
     body.innerHTML = spinnerHTML;
-    var baseUrl = video_data.base_url || '/api/v1/comments/'+ video_data.id
+    var baseUrl = video_data.base_url || '/api/v1/comments/'+ video_data.id;
     var url = baseUrl +
         '?format=html' +
         '&hl=' + video_data.preferences.locale +
@@ -133,7 +133,7 @@ function get_youtube_replies(target, load_more, load_replies) {
         '&continuation=' + continuation;
 
     if (video_data.ucid) {
-        url += '&ucid=' + video_data.ucid
+        url += '&ucid=' + video_data.ucid;
     }
     if (load_replies) url += '&action=action_get_comment_replies';
 
@@ -171,4 +171,4 @@ function get_youtube_replies(target, load_more, load_replies) {
             body.innerHTML = fallback;
         }
     });
-}
\ No newline at end of file
+}
diff --git a/assets/js/handlers.js b/assets/js/handlers.js
index 539974fb..35423c7e 100644
--- a/assets/js/handlers.js
+++ b/assets/js/handlers.js
@@ -73,6 +73,7 @@
         el.onclick = function () { remove_subscription(el); };
     });
     document.querySelectorAll('[data-onclick="notification_requestPermission"]').forEach(function (el) {
+        // eslint-disable-next-line compat/compat
         el.onclick = function () { Notification.requestPermission(); };
     });
 
@@ -132,7 +133,7 @@
 
         // Ignore shortcuts if any text input is focused
         let focused_tag = document.activeElement.tagName.toLowerCase();
-        const allowed = /^(button|checkbox|file|radio|submit)$/;
+        const allowed = /^(?:button|checkbox|file|radio|submit)$/;
 
         if (focused_tag === 'textarea') return;
         if (focused_tag === 'input') {
diff --git a/assets/js/player.js b/assets/js/player.js
index 71c5e7da..112a96d8 100644
--- a/assets/js/player.js
+++ b/assets/js/player.js
@@ -188,8 +188,12 @@ if (location.pathname.startsWith('/embed/')) {
 // Detection code taken from https://stackoverflow.com/a/20293441
 
 function isMobile() {
-  try{ document.createEvent('TouchEvent'); return true; }
-  catch(e){ return false; }
+    try {
+        document.createEvent('TouchEvent');
+        return true;
+    } catch(e) {
+        return false;
+    }
 }
 
 if (isMobile()) {
@@ -203,8 +207,8 @@ if (isMobile()) {
     // Create new control bar object for operation buttons
     const ControlBar = videojs.getComponent('controlBar');
     let operations_bar = new ControlBar(player, {
-      children: [],
-      playbackRates: [0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0]
+        children: [],
+        playbackRates: [0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0]
     });
     buttons.slice(1).forEach(function (child) {operations_bar.addChild(child);});
 
@@ -307,7 +311,7 @@ function updateCookie(newVolume, newSpeed) {
     var date = new Date();
     date.setFullYear(date.getFullYear() + 2);
 
-    var ipRegex = /^((\d+\.){3}\d+|[\dA-Fa-f]*:[\d:A-Fa-f]*:[\d:A-Fa-f]+)$/;
+    var ipRegex = /^(?:(?:\d+\.){3}\d+|[\dA-F]*:[\dA-F]*:[\d:A-F]+)$/i;
     var domainUsed = location.hostname;
 
     // Fix for a bug in FF where the leading dot in the FQDN is not ignored
@@ -362,8 +366,9 @@ if (video_data.params.save_player_pos) {
             lastUpdated = time;
         }
     });
+} else {
+    remove_all_video_times();
 }
-else remove_all_video_times();
 
 if (video_data.params.autoplay) {
     var bpb = player.getChild('bigPlayButton');
@@ -427,8 +432,8 @@ if (!video_data.params.listen && video_data.params.annotations) {
     addEventListener('load', function (e) {
         addEventListener('__ar_annotation_click', function (e) {
             const url = e.detail.url,
-                  target = e.detail.target,
-                  seconds = e.detail.seconds;
+                target = e.detail.target,
+                seconds = e.detail.seconds;
             var path = new URL(url);
 
             if (path.href.startsWith('https://www.youtube.com/watch?') && seconds) {
@@ -593,20 +598,20 @@ addEventListener('keydown', function (e) {
         return;
     }
     // See https://github.com/ctd1500/videojs-hotkeys/blob/bb4a158b2e214ccab87c2e7b95f42bc45c6bfd87/videojs.hotkeys.js#L310-L313
-    const isPlayerFocused = false
-        || e.target === document.querySelector('.video-js')
-        || e.target === document.querySelector('.vjs-tech')
-        || e.target === document.querySelector('.iframeblocker')
-        || e.target === document.querySelector('.vjs-control-bar')
+    const isPlayerFocused = false ||
+        e.target === document.querySelector('.video-js') ||
+        e.target === document.querySelector('.vjs-tech') ||
+        e.target === document.querySelector('.iframeblocker') ||
+        e.target === document.querySelector('.vjs-control-bar')
         ;
     let action = null;
 
     const code = e.keyCode;
     const decoratedKey =
-        e.key
-        + (e.altKey ? '+alt' : '')
-        + (e.ctrlKey ? '+ctrl' : '')
-        + (e.metaKey ? '+meta' : '')
+        e.key +
+        (e.altKey ? '+alt' : '') +
+        (e.ctrlKey ? '+ctrl' : '') +
+        (e.metaKey ? '+meta' : '')
         ;
     switch (decoratedKey) {
         case ' ':
diff --git a/assets/js/watch.js b/assets/js/watch.js
index 26ad138f..7edf61f4 100644
--- a/assets/js/watch.js
+++ b/assets/js/watch.js
@@ -142,17 +142,17 @@ function get_reddit_comments() {
             </div> \
             <div>{contentHtml}</div> \
             <hr>'.supplant({
-                title: response.title,
-                youtubeCommentsText: video_data.youtube_comments_text,
-                redditPermalinkText: video_data.reddit_permalink_text,
-                permalink: response.permalink,
-                contentHtml: response.contentHtml
-            });
+                    title: response.title,
+                    youtubeCommentsText: video_data.youtube_comments_text,
+                    redditPermalinkText: video_data.reddit_permalink_text,
+                    permalink: response.permalink,
+                    contentHtml: response.contentHtml
+                });
 
             comments.children[0].children[0].children[0].onclick = toggle_comments;
             comments.children[0].children[1].children[0].onclick = swap_comments;
         },
-        onNon200: onNon200, // declared above
+        onNon200: onNon200 // declared above
     });
 }