ytdl_hook.lua: set the title in metadata

93fe7a5 made global_tags work with all_formats=yes, so do like
suggested in 8ea7aa5 and set the title via tags.

This makes available in ${metadata/title}, even if you set
--force-media-title separately.

--force-media-title is also set when self_redirecting_url is true, but
tags seem not to be set in this case and I don't know where to find such
videos to test. It was originally added to close #5313, but the URL
linked there no longer loads.

Author: guidocella

player/lua/ytdl_hook.lua

@@ -37,6 +37,7 @@ end
 
 -- youtube-dl JSON name to mpv tag name
 local tag_list = {
+    ["title"]           = "title",
     ["artist"]          = "artist",
     ["album"]           = "album",
     ["album_artist"]    = "album_artist",
@@ -730,10 +731,6 @@ local function add_single_video(json)
 
     mp.set_property("stream-open-filename", streamurl:gsub("^data:", "data://", 1))
 
-    if mp.get_property("force-media-title", "") == "" then
-        mp.set_property("file-local-options/force-media-title", json.title)
-    end
-
     -- set hls-bitrate for dash track selection
     if max_bitrate > 0 and
         not option_was_set("hls-bitrate") and