added video download manager

video-dl.lua

@@ -0,0 +1,57 @@
+#!/usr/bin/env luajit
+
+local helptext = [[Usage:
+
+  ./video-dl.lua [action] <url>
+
+[action]: What is desired.
+            video (default): Highest quality video (maximum 720p).
+            backup, clone, copy: English subtitles (including automatic
+              subtitles), thumbnail, description, highest quality video
+              (maximum 720p).
+            music, audio: Highest quality audio only.
+            metadata, meta: English subtitles (including automatic
+              subtitles), thumbnail, description.
+<url>:    Source. YouTube URL expected, but should work with anything
+            yt-dlp works with.
+]]
+
+local action, url
+
+if #arg < 2 then
+  if arg[1]:find("help") then
+    print(help)
+    return false
+  end
+  action = "video"
+  url = arg[1]
+else
+  action = arg[1]
+  url = arg[2]
+end
+
+local execute = {
+  backup = function()
+    os.execute("yt-dlp --retries 100 --write-sub --write-auto-sub --sub-lang \"en.*\" --write-thumbnail --write-description -f \"bestvideo[height<=720]+bestaudio/best[height<=720]\" \"" .. url .."\"")
+  end,
+  music = function()
+    os.execute("yt-dlp --retries 100 -x --audio-quality 0 \"" .. url .."\"")
+  end,
+  metadata = function()
+    os.execute("yt-dlp --retries 100 --write-sub --write-auto-sub --sub-lang \"en.*\" --write-thumbnail --write-description --skip-download \"" .. url .."\"")
+  end,
+  video = function()
+    os.execute("yt-dlp --retries 100 -f \"bestvideo[height<=720]+bestaudio/best[height<=720]\" \"" .. url .. "\"")
+  end,
+}
+execute.clone = execute.backup
+execute.copy = execute.backup
+execute.audio = execute.music
+execute.meta = execute.metadata
+
+if execute[action] then
+  execute[action]()
+else
+  print("Invalid <action>")
+  print("Received:", "action", action, "url", url)
+end