Repository: yt-dlp/yt-dlp
Issue category: Bug Report

Issue:
The `uploader_id` template does not print asian characters or letters with diacritical marks on the yt site.
### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I *intentionally* remove or skip any mandatory\* field

### Checklist

- [X] I'm reporting that yt-dlp is broken on a **supported** site
- [X] I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
- [X] I've checked that all provided URLs are playable in a browser with the same IP and same login details
- [X] I've checked that all URLs and arguments with special characters are [properly quoted or escaped](https://github.com/yt-dlp/yt-dlp/wiki/FAQ#video-url-contains-an-ampersand--and-im-getting-some-strange-output-1-2839-or-v-is-not-recognized-as-an-internal-or-external-command)
- [X] I've searched [known issues](https://github.com/yt-dlp/yt-dlp/issues/3766) and the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues **including closed ones**. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)
- [ ] I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and I'm willing to share it if required

### Region

_No response_

### Provide a description that is worded well enough to be understood

The template `uploader_id` doesn't print asian characters or letters with diacritical marks on the yt site. While the template `uploader` does.

_Example Channel URL:_
1. https://www.youtube.com/@으아-v1k
2. https://www.youtube.com/c/CONTROLMÁS-SUILERALTAMIRANO

_Example Command:_
`yt-dlp -o "./%(uploader)s %(uploader_id)s/Videos/%(upload_date)s %(uploader_id)s %(title)s [%(id)s].%(ext)s" "Example_Channel_URL"`

_Output:_ 
Name of the created folders
1. `ㅇㅇ#`
2. `Suiler Altamirano - Control + NA`

Using the `--print` argument.

_Command:_
`yt-dlp -vU --print uploader,uploader_id "https://www.youtube.com/shorts/18NGQq7p3LY"`

_Ouput:_
```
ㅇㅇ
NA
```

### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [ ] If using API, add `'verbose': True` to `YoutubeDL` params instead
- [X] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[debug] Command-line config: ['-vU', '--print', 'uploader,uploader_id', 'https://www.youtube.com/shorts/18NGQq7p3LY']
[debug] Encodings: locale cp1252, fs utf-8, pref cp1252, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2024.12.13 from yt-dlp/yt-dlp [542166962] (win_exe)
[debug] Python 3.10.11 (CPython AMD64 64bit) - Windows-10-10.0.19045-SP0 (OpenSSL 1.1.1t  7 Feb 2023)
[debug] exe versions: ffmpeg 2024-07-07-git-0619138639-full_build-www.gyan.dev (setts), ffprobe 2024-07-07-git-0619138639-full_build-www.gyan.dev, phantomjs 2.1.1
[debug] Optional libraries: Cryptodome-3.21.0, brotli-1.1.0, certifi-2024.08.30, curl_cffi-0.5.10, mutagen-1.47.0, requests-2.32.3, sqlite3-3.40.1, urllib3-2.2.3, websockets-14.1
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets, curl_cffi
[debug] Extractor Plugins: 
[debug] Post-Processor Plugins: 
[debug] Plugin directories: []
[debug] Loaded 1839 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.12.13 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.12.13 from yt-dlp/yt-dlp)
[youtube] Extracting URL: https://www.youtube.com/shorts/18NGQq7p3LY
[youtube] 18NGQq7p3LY: Downloading webpage
[youtube] 18NGQq7p3LY: Downloading ios player API JSON
[youtube] 18NGQq7p3LY: Downloading mweb player API JSON
[debug] Loading youtube-nsig.f8f53e1a from cache
[debug] [youtube] Decrypted nsig uq0JCV23R3b7atLWxO4 => 9vigDFaIWXoXwA
[debug] Loading youtube-nsig.f8f53e1a from cache
[debug] [youtube] Decrypted nsig -T_DSjpoOPpyTJKSn0b => N9TXRFGASCEhbA
[youtube] 18NGQq7p3LY: Downloading m3u8 information
[debug] Sort order given by extractor: quality, res, fps, hdr:12, source, vcodec, channels, acodec, lang, proto
[debug] Formats sorted by: hasvid, ie_pref, quality, res, fps, hdr:12(7), source, vcodec, channels, acodec, lang, proto, size, br, asr, vext, aext, hasaud, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] 18NGQq7p3LY: Downloading 1 format(s): 315+251
ㅇㅇ
NA
```



Hints:

Patch:
diff --git a/yt_dlp/extractor/youtube.py b/yt_dlp/extractor/youtube.py
index fd9c7107c7f7..e12f728ea323 100644
--- a/yt_dlp/extractor/youtube.py
+++ b/yt_dlp/extractor/youtube.py
@@ -518,11 +518,12 @@ def ucid_or_none(self, ucid):
         return self._search_regex(rf'^({self._YT_CHANNEL_UCID_RE})$', ucid, 'UC-id', default=None)
 
     def handle_or_none(self, handle):
-        return self._search_regex(rf'^({self._YT_HANDLE_RE})$', handle, '@-handle', default=None)
+        return self._search_regex(rf'^({self._YT_HANDLE_RE})$', urllib.parse.unquote(handle or ''),
+                                  '@-handle', default=None)
 
     def handle_from_url(self, url):
         return self._search_regex(rf'^(?:https?://(?:www\.)?youtube\.com)?/({self._YT_HANDLE_RE})',
-                                  url, 'channel handle', default=None)
+                                  urllib.parse.unquote(url or ''), 'channel handle', default=None)
 
     def ucid_from_url(self, url):
         return self._search_regex(rf'^(?:https?://(?:www\.)?youtube\.com)?/({self._YT_CHANNEL_UCID_RE})',
@@ -2801,6 +2802,35 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 'extractor_args': {'youtube': {'player_client': ['ios'], 'player_skip': ['webpage']}},
             },
         },
+        {
+            # uploader_id has non-ASCII characters that are percent-encoded in YT's JSON
+            'url': 'https://www.youtube.com/shorts/18NGQq7p3LY',
+            'info_dict': {
+                'id': '18NGQq7p3LY',
+                'ext': 'mp4',
+                'title': '아이브 이서 장원영 리즈 삐끼삐끼 챌린지',
+                'description': '',
+                'uploader': 'ㅇㅇ',
+                'uploader_id': '@으아-v1k',
+                'uploader_url': 'https://www.youtube.com/@으아-v1k',
+                'channel': 'ㅇㅇ',
+                'channel_id': 'UCC25oTm2J7ZVoi5TngOHg9g',
+                'channel_url': 'https://www.youtube.com/channel/UCC25oTm2J7ZVoi5TngOHg9g',
+                'thumbnail': r're:https?://.+/.+\.jpg',
+                'playable_in_embed': True,
+                'age_limit': 0,
+                'duration': 3,
+                'timestamp': 1724306170,
+                'upload_date': '20240822',
+                'availability': 'public',
+                'live_status': 'not_live',
+                'view_count': int,
+                'like_count': int,
+                'channel_follower_count': int,
+                'categories': ['People & Blogs'],
+                'tags': [],
+            },
+        },
     ]
 
     _WEBPAGE_TESTS = [


Test patch: