diff --git a/player/lua/ytdl_hook.lua b/player/lua/ytdl_hook.lua
index 3161da6194..24b03e119c 100644
--- a/player/lua/ytdl_hook.lua
+++ b/player/lua/ytdl_hook.lua
@@ -129,7 +129,7 @@ local function set_http_headers(http_headers)
         mp.set_property("file-local-options/user-agent", useragent)
     end
     local additional_fields = {"Cookie", "Referer", "X-Forwarded-For"}
-    for idx, item in pairs(additional_fields) do
+    for _, item in pairs(additional_fields) do
         local field_value = http_headers[item]
         if field_value then
             headers[#headers + 1] = item .. ": " .. field_value
@@ -335,7 +335,7 @@ local function make_absolute_url(base_url, url)
     rest:gsub("([^/]+)", function(c) table.insert(segs, c) end)
     url:gsub("([^/]+)", function(c) table.insert(segs, c) end)
     local resolved_url = {}
-    for i, v in ipairs(segs) do
+    for _, v in ipairs(segs) do
         if v == ".." then
             table.remove(resolved_url)
         elseif v ~= "." then
@@ -478,7 +478,7 @@ local function formats_to_edl(json, formats, use_all_formats)
     local streams = {}
 
     local tbr_only = true
-    for index, track in ipairs(formats) do
+    for _, track in ipairs(formats) do
         tbr_only = tbr_only and track["tbr"] and
                    (not track["abr"]) and (not track["vbr"])
     end
@@ -492,8 +492,7 @@ local function formats_to_edl(json, formats, use_all_formats)
     -- Iterate in reverse to get best track first.
     for index = #formats, 1, -1 do
         local track = formats[index]
-        local edl_track = nil
-        edl_track = edl_track_joined(track.fragments,
+        local edl_track = edl_track_joined(track.fragments,
             track.protocol, json.is_live,
             track.fragment_base_url)
         if not edl_track and not url_is_safe(track.url) then
@@ -686,8 +685,7 @@ local function add_single_video(json)
 
     if streamurl == "" and json.url then
         format_info = "youtube-dl (single)"
-        local edl_track = nil
-        edl_track = edl_track_joined(json.fragments, json.protocol,
+        local edl_track = edl_track_joined(json.fragments, json.protocol,
             json.is_live, json.fragment_base_url)
 
         if not edl_track and not url_is_safe(json.url) then
@@ -1075,7 +1073,7 @@ function run_ytdl_hook(url)
                 json.entries[entry_wsubs].duration ~= nil then
                 for j, req in pairs(json.entries[entry_wsubs].requested_subtitles) do
                     local subfile = "edl://"
-                    for i, entry in pairs(json.entries) do
+                    for _, entry in pairs(json.entries) do
                         if entry.requested_subtitles ~= nil and
                             entry.requested_subtitles[j] ~= nil and
                             url_is_safe(entry.requested_subtitles[j].url) then
@@ -1096,7 +1094,7 @@ function run_ytdl_hook(url)
         else
             local playlist_index = parse_yt_playlist(url, json)
             local playlist = {"#EXTM3U"}
-            for i, entry in pairs(json.entries) do
+            for _, entry in pairs(json.entries) do
                 local site = entry.url
                 local title = entry.title