feat: integrate bgutil-ytdlp-pot-provider to bypass YouTube PO Tokens

- Replaced contents of `requirements.txt` to strictly include core yt-dlp dependencies and the new anti-blocking tools (`bgutil-ytdlp-pot-provider` and `bgutil`).
- Added `bgutil` to the auto-installation requirement list in `__init__.py`.
- Updated the pip install command in `__init__.py` to include `bgutil-ytdlp-pot-provider`.
- Combined the new `po_token=web+bgutil` extractor argument with the existing `youtube:player_client` definitions in `build_cmd` to bypass blocking issues.

__init__.py

@@ -21,6 +21,7 @@ def install_missing_requirements():
         ("opencv-python", "cv2"),
         ("websockets", "websockets"),
         ("playwright", "playwright"),
+        ("bgutil", "bgutil"),
     ]
 
     missing = []
@@ -31,7 +32,7 @@ def install_missing_requirements():
     if missing:
         print(f"📥 ComfyUI-Ytdpl: Instalando dependencias faltantes: {missing}")
         try:
-            subprocess.check_call([sys.executable, "-m", "pip", "install", "--quiet", *missing, "yt-dlp-ejs"])
+            subprocess.check_call([sys.executable, "-m", "pip", "install", "--quiet", *missing, "yt-dlp-ejs", "bgutil-ytdlp-pot-provider"])
             print("✅ Dependencias instaladas correctamente.")
             if "playwright" in missing:
                 print("📥 Instalando navegadores de Playwright...")
@@ -211,9 +212,9 @@ class YTDLPVideoDownloader:
 
                     if cookie_path_to_use:
                         cmd.extend(["--cookies", str(cookie_path_to_use)])
-                        cmd.extend(["--extractor-args", "youtube:player_client=tv_downgraded,web"])
+                        cmd.extend(["--extractor-args", "youtube:player_client=tv_downgraded,web;po_token=web+bgutil"])
                     else:
-                        cmd.extend(["--extractor-args", "youtube:player_client=android,tv"])
+                        cmd.extend(["--extractor-args", "youtube:player_client=android,tv;po_token=web+bgutil"])
 
                     # === CAMBIO: USAR NOMBRES GENÉRICOS DE NAVEGADOR PARA CURL-CFFI ===
                     if browser_source != "Ninguno":

requirements.txt

@@ -4,3 +4,6 @@ yt-dlp-ejs              # Motor para resolver el JS Challenge de YouTube
 curl-cffi               # Necesario para "impersonation" (Bypass HTTP 403)
 websockets              # Requerido por componentes internos de yt-dlp
 
+# --- Sistema Anti-Bloqueos (PO Tokens) ---
+bgutil-ytdlp-pot-provider # Plugin para evasión de bloqueos
+bgutil                  # Motor base para resolver Botguard