diff --git a/config/sql/users.sql b/config/sql/users.sql
index 54f74219..2abcb991 100644
--- a/config/sql/users.sql
+++ b/config/sql/users.sql
@@ -12,6 +12,7 @@ CREATE TABLE public.users
     preferences text COLLATE pg_catalog."default",
     password text COLLATE pg_catalog."default",
     token text COLLATE pg_catalog."default",
+    watched text[] COLLATE pg_catalog."default",
     CONSTRAINT users_email_key UNIQUE (email),
     CONSTRAINT users_id_key UNIQUE (id)
 )
diff --git a/src/invidious.cr b/src/invidious.cr
index 137ce72a..35169ce1 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -270,20 +270,24 @@ get "/" do |env|
 end
 
 get "/watch" do |env|
-  user = env.get? "user"
-  if user
-    user = user.as(User)
-    preferences = user.preferences
-    subscriptions = user.subscriptions.as(Array(String))
-  end
-  subscriptions ||= [] of String
-
   if env.params.query["v"]?
     id = env.params.query["v"]
   else
     next env.redirect "/"
   end
 
+  user = env.get? "user"
+  if user
+    user = user.as(User)
+    if user.watched != ["N/A"] && !user.watched.includes? id
+      PG_DB.exec("UPDATE users SET watched = watched || $1 WHERE id = $2", [id], user.id)
+    end
+
+    preferences = user.preferences
+    subscriptions = user.subscriptions.as(Array(String))
+  end
+  subscriptions ||= [] of String
+
   autoplay = env.params.query["autoplay"]?.try &.to_i
   video_loop = env.params.query["video_loop"]?.try &.to_i
 
@@ -1618,8 +1622,12 @@ post "/login" do |env|
 
       sid = Base64.encode(Random::Secure.random_bytes(50))
       user = create_user(sid, email, password)
+      if user.watched = ["N/A"]
+        user_array = user.to_a[0..-2]
+      else
+        user_array = user.to_a
+      end
 
-      user_array = user.to_a
       user_array[5] = user_array[5].to_json
       args = arg_array(user_array)
 
@@ -1719,6 +1727,10 @@ post "/preferences" do |env|
     latest_only ||= "off"
     latest_only = latest_only == "on"
 
+    unseen_only = env.params.body["unseen_only"]?.try &.as(String)
+    unseen_only ||= "off"
+    unseen_only = unseen_only == "on"
+
     preferences = {
       "video_loop"    => video_loop,
       "autoplay"      => autoplay,
@@ -1732,6 +1744,7 @@ post "/preferences" do |env|
       "max_results"   => max_results,
       "sort"          => sort,
       "latest_only"   => latest_only,
+      "unseen_only"   => unseen_only,
     }.to_json
 
     PG_DB.exec("UPDATE users SET preferences = $1 WHERE email = $2", preferences, user.email)
@@ -1773,14 +1786,41 @@ get "/feed/subscriptions" do |env|
     end
 
     if preferences.latest_only
-      args = arg_array(user.subscriptions)
-      videos = PG_DB.query_all("SELECT DISTINCT ON (ucid) * FROM channel_videos WHERE \
-      ucid IN (#{args}) ORDER BY ucid, published DESC", user.subscriptions, as: ChannelVideo)
+      if preferences.unseen_only
+        ucids = arg_array(user.subscriptions)
+        if user.watched.empty?
+          watched = "'{}'"
+        else
+          watched = arg_array(user.watched, user.subscriptions.size + 1)
+        end
+
+        videos = PG_DB.query_all("SELECT DISTINCT ON (ucid) * FROM channel_videos WHERE \
+      ucid IN (#{ucids}) AND id NOT IN (#{watched}) ORDER BY ucid, published DESC",
+          user.subscriptions + user.watched, as: ChannelVideo)
+      else
+        args = arg_array(user.subscriptions)
+        videos = PG_DB.query_all("SELECT DISTINCT ON (ucid) * FROM channel_videos WHERE \
+        ucid IN (#{args}) ORDER BY ucid, published DESC", user.subscriptions, as: ChannelVideo)
+      end
+
       videos.sort_by! { |video| video.published }.reverse!
     else
-      args = arg_array(user.subscriptions, 3)
-      videos = PG_DB.query_all("SELECT * FROM channel_videos WHERE ucid IN (#{args}) \
-    ORDER BY published DESC LIMIT $1 OFFSET $2", [limit, offset] + user.subscriptions, as: ChannelVideo)
+      if preferences.unseen_only
+        ucids = arg_array(user.subscriptions, 3)
+        if user.watched.empty?
+          watched = "'{}'"
+        else
+          watched = arg_array(user.watched, user.subscriptions.size + 3)
+        end
+
+        videos = PG_DB.query_all("SELECT * FROM channel_videos WHERE ucid IN (#{ucids}) \
+          AND id NOT IN (#{watched}) ORDER BY published DESC LIMIT $1 OFFSET $2",
+          [limit, offset] + user.subscriptions + user.watched, as: ChannelVideo)
+      else
+        args = arg_array(user.subscriptions, 3)
+        videos = PG_DB.query_all("SELECT * FROM channel_videos WHERE ucid IN (#{args}) \
+          ORDER BY published DESC LIMIT $1 OFFSET $2", [limit, offset] + user.subscriptions, as: ChannelVideo)
+      end
     end
 
     case preferences.sort
@@ -2167,6 +2207,20 @@ get "/subscription_ajax" do |env|
   env.redirect referer
 end
 
+get "/clear_watch_history" do |env|
+  user = env.get? "user"
+  referer = env.request.headers["referer"]?
+  referer ||= "/"
+
+  if user
+    user = user.as(User)
+
+    PG_DB.exec("UPDATE users SET watched = '{}' WHERE id = $1", user.id)
+  end
+
+  env.redirect referer
+end
+
 get "/user/:user" do |env|
   user = env.params.url["user"]
   env.redirect "/channel/#{user}"
diff --git a/src/invidious/helpers.cr b/src/invidious/helpers.cr
index 370e1efd..d978ec29 100644
--- a/src/invidious/helpers.cr
+++ b/src/invidious/helpers.cr
@@ -29,6 +29,7 @@ DEFAULT_USER_PREFERENCES = Preferences.from_json({
   "max_results" => 40,
   "sort"        => "published",
   "latest_only" => false,
+  "unseen_only" => false,
 }.to_json)
 
 class Config
@@ -147,6 +148,10 @@ class User
     },
     password: String?,
     token:    String,
+    watched:  {
+      type:    Array(String),
+      default: ["N/A"],
+    },
   })
 end
 
@@ -177,6 +182,7 @@ class Preferences
     max_results: Int32,
     sort:        String,
     latest_only: Bool,
+    unseen_only: Bool,
   })
 end
 
@@ -817,7 +823,12 @@ def get_user(sid, client, headers, db, refresh = true)
 
     if refresh && Time.now - user.updated > 1.minute
       user = fetch_user(sid, client, headers, db)
-      user_array = user.to_a
+      if user.watched = ["N/A"]
+        user_array = user.to_a[0..-2]
+      else
+        user_array = user.to_a
+      end
+
       user_array[5] = user_array[5].to_json
       args = arg_array(user_array)
 
@@ -826,7 +837,12 @@ def get_user(sid, client, headers, db, refresh = true)
     end
   else
     user = fetch_user(sid, client, headers, db)
-    user_array = user.to_a
+    if user.watched = ["N/A"]
+      user_array = user.to_a[0..-2]
+    else
+      user_array = user.to_a
+    end
+
     user_array[5] = user_array[5].to_json
     args = arg_array(user.to_a)
 
@@ -864,7 +880,7 @@ def fetch_user(sid, client, headers, db)
 
   token = Base64.encode(Random::Secure.random_bytes(32))
 
-  user = User.new(sid, Time.now, [] of String, channels, email, DEFAULT_USER_PREFERENCES, nil, token)
+  user = User.new(sid, Time.now, [] of String, channels, email, DEFAULT_USER_PREFERENCES, nil, token, [] of String)
   return user
 end
 
@@ -872,7 +888,7 @@ def create_user(sid, email, password)
   password = Crypto::Bcrypt::Password.create(password, cost: 10)
   token = Base64.encode(Random::Secure.random_bytes(32))
 
-  user = User.new(sid, Time.now, [] of String, [] of String, email, DEFAULT_USER_PREFERENCES, password.to_s, token)
+  user = User.new(sid, Time.now, [] of String, [] of String, email, DEFAULT_USER_PREFERENCES, password.to_s, token, [] of String)
 
   return user
 end
diff --git a/src/invidious/views/preferences.ecr b/src/invidious/views/preferences.ecr
index 7f675bcc..70f4d73a 100644
--- a/src/invidious/views/preferences.ecr
+++ b/src/invidious/views/preferences.ecr
@@ -88,10 +88,22 @@ function update_value(element) {
             </div>
 
             <div class="pure-control-group">
-                <label for="latest_only">Only show latest video from channel: </label>
+                <label for="latest_only">Only show latest <% if user.preferences.unseen_only %>unseen<% end %> video from channel: </label>
                 <input name="latest_only" id="latest_only" type="checkbox" <% if user.preferences.latest_only %>checked<% end %>>
             </div>
 
+            <div class="pure-control-group">
+                <label for="unseen_only">Only show unseen: </label>
+                <input name="unseen_only" id="unseen_only" type="checkbox" <% if user.preferences.unseen_only %>checked<% end %>>
+            </div>
+
+            <legend>Data preferences</legend>
+            <div class="pure-control-group">
+                <label>
+                    <a href="/clear_watch_history">Clear watch history</a>
+                </labe>
+            </div>
+
             <div class="pure-controls">
                 <button type="submit" class="pure-button pure-button-primary">Save preferences</button>
             </div>