Bump pip from 26.0.1 to 26.1

Bumps [pip](https://github.com/pypa/pip) from 26.0.1 to 26.1.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](https://github.com/pypa/pip/compare/26.0.1...26.1)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: '26.1'
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

poetry.lock

@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.2.1 and should not be changed by hand.
 
 [[package]]
 name = "accessible-pygments"
@@ -1908,14 +1908,14 @@ xmp = ["defusedxml"]
 
 [[package]]
 name = "pip"
-version = "26.0.1"
+version = "26.1"
 description = "The PyPA recommended tool for installing Python packages."
 optional = false
-python-versions = ">=3.9"
+python-versions = ">=3.10"
 groups = ["main"]
 files = [
-    {file = "pip-26.0.1-py3-none-any.whl", hash = "sha256:bdb1b08f4274833d62c1aa29e20907365a2ceb950410df15fc9521bad440122b"},
+    {file = "pip-26.1-py3-none-any.whl", hash = "sha256:4e8486d821d814b77319acb7b9e8bf5a4ee7590a643e7cb21029f209be8573c1"},
-    {file = "pip-26.0.1.tar.gz", hash = "sha256:c4037d8a277c89b320abe636d59f91e6d0922d08a05b60e85e53b296613346d8"},
+    {file = "pip-26.1.tar.gz", hash = "sha256:81e13ebcca3ffa8cc85e4deff5c27e1ee26dea0aa7fc2f294a073ac208806ff3"},
 ]
 
 [[package]]

src/auto_archiver/utils/deletion_detection.py

@@ -64,6 +64,7 @@ class DeletionIndicators:
     # YouTube deletion indicators
     YOUTUBE = [
         "This video isn't available anymore",
+        "Video unavailable",
         "This video has been removed",
         "This video is no longer available",
         "This video is private",