diff --git a/src/ytdl_sub/downloaders/info_json/info_json_downloader.py b/src/ytdl_sub/downloaders/info_json/info_json_downloader.py
index 8d8276ed..0198c4ae 100644
--- a/src/ytdl_sub/downloaders/info_json/info_json_downloader.py
+++ b/src/ytdl_sub/downloaders/info_json/info_json_downloader.py
@@ -15,8 +15,6 @@ from ytdl_sub.entries.entry import Entry
 from ytdl_sub.entries.script.variable_definitions import VARIABLES as v
 from ytdl_sub.entries.script.variable_scripts import ENTRY_INJECTED_VARIABLES
 from ytdl_sub.entries.script.variable_scripts import VARIABLE_SCRIPTS
-from ytdl_sub.entries.variables.kwargs import DOWNLOAD_INDEX
-from ytdl_sub.entries.variables.kwargs import UPLOAD_DATE_INDEX
 from ytdl_sub.utils.exceptions import ValidationException
 from ytdl_sub.utils.file_handler import FileHandler
 from ytdl_sub.utils.file_handler import get_file_extension
diff --git a/src/ytdl_sub/downloaders/url/downloader.py b/src/ytdl_sub/downloaders/url/downloader.py
index af24c2e9..395df11c 100644
--- a/src/ytdl_sub/downloaders/url/downloader.py
+++ b/src/ytdl_sub/downloaders/url/downloader.py
@@ -23,7 +23,6 @@ from ytdl_sub.downloaders.ytdlp import YTDLP
 from ytdl_sub.entries.entry import Entry
 from ytdl_sub.entries.entry_parent import EntryParent
 from ytdl_sub.entries.script.variable_definitions import VARIABLES as v
-from ytdl_sub.entries.variables.kwargs import COLLECTION_URL
 from ytdl_sub.entries.variables.kwargs import PLAYLIST_ENTRY
 from ytdl_sub.entries.variables.kwargs import SOURCE_ENTRY
 from ytdl_sub.utils.file_handler import FileHandler
@@ -143,9 +142,9 @@ class UrlDownloaderThumbnailPlugin(SourcePluginExtension):
         if not self.is_dry_run:
             try_convert_download_thumbnail(entry=entry)
 
-        if entry.kwargs_get(COLLECTION_URL) in self._collection_url_mapping:
+        if (input_url := entry.get_str(v.ytdl_sub_input_url)) in self._collection_url_mapping:
             self._download_url_thumbnails(
-                collection_url=self._collection_url_mapping[entry.kwargs(COLLECTION_URL)],
+                collection_url=self._collection_url_mapping[input_url],
                 entry=entry,
             )
         return entry
@@ -177,7 +176,7 @@ class UrlDownloaderCollectionVariablePlugin(SourcePluginExtension):
         """
         # COLLECTION_URL is a recent variable that may not exist for old entries when updating.
         # Try to use source_webpage_url if it does not exist
-        entry_collection_url = entry.kwargs_get(COLLECTION_URL, entry.get_str(v.source_webpage_url))
+        entry_collection_url = entry.get_str(v.ytdl_sub_input_url)
 
         # If the collection URL cannot find its mapping, use the last URL
         collection_url = (
@@ -460,13 +459,16 @@ class MultiUrlDownloader(SourcePlugin[MultiUrlValidator]):
             for entry in self._iterate_entries(
                 url_validator=collection_url, parents=parents, orphans=orphan_entries
             ):
-                # Add the collection URL to the info_dict to trace where it came from
-                entry.add_kwargs(
-                    {COLLECTION_URL: self.overrides.apply_formatter(collection_url.url)}
-                )
-                yield entry.initialize_script(
+                entry.initialize_script(
                     override_variables=self.overrides.dict_with_format_strings
+                ).add(
+                    {
+                        v.ytdl_sub_input_url.variable_name: self.overrides.apply_formatter(
+                            collection_url.url
+                        )
+                    }
                 )
+                yield entry
 
     def download(self, entry: Entry) -> Optional[Entry]:
         """
diff --git a/src/ytdl_sub/entries/script/variable_definitions.py b/src/ytdl_sub/entries/script/variable_definitions.py
index 53e2ed48..cd6ba73f 100644
--- a/src/ytdl_sub/entries/script/variable_definitions.py
+++ b/src/ytdl_sub/entries/script/variable_definitions.py
@@ -606,6 +606,10 @@ class _Variables:
     def requested_subtitles(self) -> MetadataVariable:
         return MetadataVariable("requested_subtitles", "requested_subtitles")
 
+    @property
+    def ytdl_sub_input_url(self) -> Variable:
+        return Variable("ytdl_sub_input_url")
+
     @property
     def download_index(self) -> Variable:
         """
diff --git a/src/ytdl_sub/entries/script/variable_scripts.py b/src/ytdl_sub/entries/script/variable_scripts.py
index 0430ade3..9e7c1f98 100644
--- a/src/ytdl_sub/entries/script/variable_scripts.py
+++ b/src/ytdl_sub/entries/script/variable_scripts.py
@@ -129,7 +129,7 @@ ENTRY_DEFAULT_VARIABLES: Dict[MetadataVariable, str] = {
     v.channel_id: entry_get(v.channel_id, v.uploader_id),
 }
 
-# TODO: MARK AS UNRESOLVABLE UNTIL THEY ARE ADDED
+# MARK AS UNRESOLVABLE UNTIL THEY ARE ADDED
 ENTRY_INJECTED_VARIABLES: Dict[Variable, str] = {
     v.download_index: "{%int(1)}",
     v.upload_date_index: "{%int(1)}",
@@ -137,6 +137,7 @@ ENTRY_INJECTED_VARIABLES: Dict[Variable, str] = {
     v.comments: "",
     v.requested_subtitles: "",
     v.sponsorblock_chapters: "",
+    v.ytdl_sub_input_url: f"{{{v.source_webpage_url.variable_name}}}",
 }
 
 ENTRY_DERIVED_VARIABLES: Dict[Variable, str] = {
diff --git a/src/ytdl_sub/entries/variables/kwargs.py b/src/ytdl_sub/entries/variables/kwargs.py
index 35a656cc..e2b33d55 100644
--- a/src/ytdl_sub/entries/variables/kwargs.py
+++ b/src/ytdl_sub/entries/variables/kwargs.py
@@ -40,10 +40,6 @@ PLAYLIST_UPLOADER = _("playlist_uploader")
 PLAYLIST_UPLOADER_ID = _("playlist_uploader_id")
 PLAYLIST_UPLOADER_URL = _("playlist_uploader_url")
 
-COLLECTION_URL = _("collection_url", backend=True)
-DOWNLOAD_INDEX = _("download_index", backend=True)
-UPLOAD_DATE_INDEX = _("upload_date_index", backend=True)
-REQUESTED_SUBTITLES = _("requested_subtitles", backend=True)
 CHAPTERS = _("chapters", backend=True)
 YTDL_SUB_CUSTOM_CHAPTERS = _("ytdl_sub_custom_chapters", backend=True)
 YTDL_SUB_REGEX_SOURCE_VARS = _("ytdl_sub_regex_source_vars", backend=True)