diff --git a/src/invidious.cr b/src/invidious.cr
index 28d8ddac..93b3357a 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -790,7 +790,7 @@ post "/data_control" do |env|
             next if !privacy
 
             playlist = create_playlist(PG_DB, title, privacy, user)
-            PG_DB.exec("UPDATE playlists SET description = $1 WHERE id = $2", description, playlist.id)
+            Invidious::Database::Playlists.update_description(playlist.id, description)
 
             videos = item["videos"]?.try &.as_a?.try &.each_with_index do |video_id, idx|
               raise InfoException.new("Playlist cannot have more than 500 videos") if idx > 500
diff --git a/src/invidious/database/playlists.cr b/src/invidious/database/playlists.cr
index 037e25b7..1dba64f3 100644
--- a/src/invidious/database/playlists.cr
+++ b/src/invidious/database/playlists.cr
@@ -37,6 +37,36 @@ module Invidious::Database::Playlists
   #  Update
   # -------------------
 
+  def update(id : String, title : String, privacy, description, updated)
+    request = <<-SQL
+      UPDATE playlists
+      SET title = $1, privacy = $2, description = $3, updated = $4
+      WHERE id = $5
+    SQL
+
+    PG_DB.exec(request, title, privacy, description, updated, id)
+  end
+
+  def update_description(id : String, description)
+    request = <<-SQL
+      UPDATE playlists
+      SET description = $1
+      WHERE id = $2
+    SQL
+
+    PG_DB.exec(request, description, id)
+  end
+
+  def update_subscription_time(id : String)
+    request = <<-SQL
+      UPDATE playlists
+      SET subscribed = $1
+      WHERE id = $2
+    SQL
+
+    PG_DB.exec(request, Time.utc, id)
+  end
+
   def update_video_added(id : String, index : String | Int64)
     request = <<-SQL
       UPDATE playlists
@@ -60,6 +90,56 @@ module Invidious::Database::Playlists
 
     PG_DB.exec(request, index, Time.utc, id)
   end
+
+  # -------------------
+  #  Salect
+  # -------------------
+
+  def select(*, id : String, raise_on_fail : Bool = false) : InvidiousPlaylist?
+    request = <<-SQL
+      SELECT * FROM playlists
+      WHERE id = $1
+    SQL
+
+    if raise_on_fail
+      return PG_DB.query_one(request, id, as: InvidiousPlaylist)
+    else
+      return PG_DB.query_one?(request, id, as: InvidiousPlaylist)
+    end
+  end
+
+  def select_all(*, author : String) : Array(InvidiousPlaylist)
+    request = <<-SQL
+      SELECT * FROM playlists
+      WHERE author = $1
+    SQL
+
+    return PG_DB.query_all(request, author, as: InvidiousPlaylist)
+  end
+
+  # -------------------
+  #  Misc checks
+  # -------------------
+
+  # Check if given playlist ID exists
+  def exists?(id : String) : Bool
+    request = <<-SQL
+      SELECT id FROM playlists
+      WHERE id = $1
+    SQL
+
+    return PG_DB.query_one?(request, id, as: String).nil?
+  end
+
+  # Count how many playlist a user has created.
+  def count_owned_by(author : String) : Int64
+    request = <<-SQL
+      SELECT count(*) FROM playlists
+      WHERE author = $1
+    SQL
+
+    return PG_DB.query_one?(request, author, as: Int64) || 0_i64
+  end
 end
 
 #
diff --git a/src/invidious/playlists.cr b/src/invidious/playlists.cr
index 685fa1c7..f68dc3b0 100644
--- a/src/invidious/playlists.cr
+++ b/src/invidious/playlists.cr
@@ -323,7 +323,7 @@ end
 
 def get_playlist(db, plid, locale, refresh = true, force_refresh = false)
   if plid.starts_with? "IV"
-    if playlist = db.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    if playlist = Invidious::Database::Playlists.select(id: plid)
       return playlist
     else
       raise InfoException.new("Playlist does not exist.")
diff --git a/src/invidious/routes/api/v1/authenticated.cr b/src/invidious/routes/api/v1/authenticated.cr
index 4fe8cd30..d74dca5c 100644
--- a/src/invidious/routes/api/v1/authenticated.cr
+++ b/src/invidious/routes/api/v1/authenticated.cr
@@ -127,7 +127,7 @@ module Invidious::Routes::API::V1::Authenticated
     env.response.content_type = "application/json"
     user = env.get("user").as(User)
 
-    playlists = PG_DB.query_all("SELECT * FROM playlists WHERE author = $1", user.email, as: InvidiousPlaylist)
+    playlists = Invidious::Database::Playlists.select_all(author: user.email)
 
     JSON.build do |json|
       json.array do
@@ -153,7 +153,7 @@ module Invidious::Routes::API::V1::Authenticated
       return error_json(400, "Invalid privacy setting.")
     end
 
-    if PG_DB.query_one("SELECT count(*) FROM playlists WHERE author = $1", user.email, as: Int64) >= 100
+    if Invidious::Database::Playlists.count_owned_by(user.email) >= 100
       return error_json(400, "User cannot have more than 100 playlists.")
     end
 
@@ -172,9 +172,12 @@ module Invidious::Routes::API::V1::Authenticated
     env.response.content_type = "application/json"
     user = env.get("user").as(User)
 
-    plid = env.params.url["plid"]
+    plid = env.params.url["plid"]?
+    if !plid || plid.empty?
+      return error_json(400, "A playlist ID is required")
+    end
 
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email && playlist.privacy.private?
       return error_json(404, "Playlist does not exist.")
     end
@@ -195,7 +198,8 @@ module Invidious::Routes::API::V1::Authenticated
       updated = playlist.updated
     end
 
-    PG_DB.exec("UPDATE playlists SET title = $1, privacy = $2, description = $3, updated = $4 WHERE id = $5", title, privacy, description, updated, plid)
+    Invidious::Database::Playlists.update(plid, title, privacy, description, updated)
+
     env.response.status_code = 204
   end
 
@@ -207,7 +211,7 @@ module Invidious::Routes::API::V1::Authenticated
 
     plid = env.params.url["plid"]
 
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email && playlist.privacy.private?
       return error_json(404, "Playlist does not exist.")
     end
@@ -229,7 +233,7 @@ module Invidious::Routes::API::V1::Authenticated
 
     plid = env.params.url["plid"]
 
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email && playlist.privacy.private?
       return error_json(404, "Playlist does not exist.")
     end
@@ -285,7 +289,7 @@ module Invidious::Routes::API::V1::Authenticated
     plid = env.params.url["plid"]
     index = env.params.url["index"].to_i64(16)
 
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email && playlist.privacy.private?
       return error_json(404, "Playlist does not exist.")
     end
diff --git a/src/invidious/routes/feeds.cr b/src/invidious/routes/feeds.cr
index 9650bcf4..6424ab47 100644
--- a/src/invidious/routes/feeds.cr
+++ b/src/invidious/routes/feeds.cr
@@ -264,7 +264,7 @@ module Invidious::Routes::Feeds
     path = env.request.path
 
     if plid.starts_with? "IV"
-      if playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+      if playlist = Invidious::Database::Playlists.select(id: plid)
         videos = get_playlist_videos(PG_DB, playlist, offset: 0, locale: locale)
 
         return XML.build(indent: "  ", encoding: "UTF-8") do |xml|
@@ -364,7 +364,7 @@ module Invidious::Routes::Feeds
     if ucid = HTTP::Params.parse(URI.parse(topic).query.not_nil!)["channel_id"]?
       PG_DB.exec("UPDATE channels SET subscribed = $1 WHERE id = $2", Time.utc, ucid)
     elsif plid = HTTP::Params.parse(URI.parse(topic).query.not_nil!)["playlist_id"]?
-      PG_DB.exec("UPDATE playlists SET subscribed = $1 WHERE id = $2", Time.utc, ucid)
+      Invidious::Database::Playlists.update_subscription_time(plid)
     else
       haltf env, status_code: 400
     end
diff --git a/src/invidious/routes/playlists.cr b/src/invidious/routes/playlists.cr
index d29aef09..b73782d5 100644
--- a/src/invidious/routes/playlists.cr
+++ b/src/invidious/routes/playlists.cr
@@ -46,7 +46,7 @@ module Invidious::Routes::Playlists
       return error_template(400, "Invalid privacy setting.")
     end
 
-    if PG_DB.query_one("SELECT count(*) FROM playlists WHERE author = $1", user.email, as: Int64) >= 100
+    if Invidious::Database::Playlists.count_owned_by(user.email) >= 100
       return error_template(400, "User cannot have more than 100 playlists.")
     end
 
@@ -85,7 +85,11 @@ module Invidious::Routes::Playlists
     sid = sid.as(String)
 
     plid = env.params.query["list"]?
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    if !plid || plid.empty?
+      return error_template(400, "A playlist ID is required")
+    end
+
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email
       return env.redirect referer
     end
@@ -117,7 +121,7 @@ module Invidious::Routes::Playlists
       return error_template(400, ex)
     end
 
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email
       return env.redirect referer
     end
@@ -148,7 +152,7 @@ module Invidious::Routes::Playlists
     page ||= 1
 
     begin
-      playlist = PG_DB.query_one("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+      playlist = Invidious::Database::Playlists.select(id: plid, raise_on_fail: true)
       if !playlist || playlist.author != user.email
         return env.redirect referer
       end
@@ -189,7 +193,7 @@ module Invidious::Routes::Playlists
       return error_template(400, ex)
     end
 
-    playlist = PG_DB.query_one?("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+    playlist = Invidious::Database::Playlists.select(id: plid)
     if !playlist || playlist.author != user.email
       return env.redirect referer
     end
@@ -206,7 +210,7 @@ module Invidious::Routes::Playlists
       updated = playlist.updated
     end
 
-    PG_DB.exec("UPDATE playlists SET title = $1, privacy = $2, description = $3, updated = $4 WHERE id = $5", title, privacy, description, updated, plid)
+    Invidious::Database::Playlists.update(plid, title, privacy, description, updated)
 
     env.redirect "/playlist?list=#{plid}"
   end
@@ -232,7 +236,7 @@ module Invidious::Routes::Playlists
     page ||= 1
 
     begin
-      playlist = PG_DB.query_one("SELECT * FROM playlists WHERE id = $1", plid, as: InvidiousPlaylist)
+      playlist = Invidious::Database::Playlists.select(id: plid, raise_on_fail: true)
       if !playlist || playlist.author != user.email
         return env.redirect referer
       end
diff --git a/src/invidious/views/playlist.ecr b/src/invidious/views/playlist.ecr
index 136981da..7825b1f0 100644
--- a/src/invidious/views/playlist.ecr
+++ b/src/invidious/views/playlist.ecr
@@ -61,7 +61,7 @@
                     <div class="pure-u-1-3"><a href="/edit_playlist?list=<%= plid %>"><i class="icon ion-md-create"></i></a></div>
                     <div class="pure-u-1-3"><a href="/delete_playlist?list=<%= plid %>"><i class="icon ion-md-trash"></i></a></div>
                 <% else %>
-                    <% if PG_DB.query_one?("SELECT id FROM playlists WHERE id = $1", playlist.id, as: String).nil? %>
+                    <% if Invidious::Database::Playlists.exists?(playlist.id) %>
                         <div class="pure-u-1-3"><a href="/subscribe_playlist?list=<%= plid %>"><i class="icon ion-md-add"></i></a></div>
                     <% else %>
                         <div class="pure-u-1-3"><a href="/delete_playlist?list=<%= plid %>"><i class="icon ion-md-trash"></i></a></div>