[ie/youtube] Implement external n/sig solver (#14157)

Closes #14404, Closes #14431, Closes #14680, Closes #14707

Authored by: bashonly, coletdjnz, seproDev, Grub4K

Co-authored-by: coletdjnz <coletdjnz@protonmail.com>
Co-authored-by: bashonly <bashonly@protonmail.com>
Co-authored-by: sepro <sepro@sepr0.com>

.github/workflows/build.yml

@@ -214,7 +214,7 @@ jobs:
 
       - name: Build Unix platform-independent binary
         run: |
-          make all tar
+          make all-extra tar
 
       - name: Verify --update-to
         if: vars.UPDATE_TO_VERIFICATION

.github/workflows/challenge-tests.yml

@@ -0,0 +1,77 @@
+name: Challenge Tests
+on:
+  push:
+    paths:
+      - .github/workflows/challenge-tests.yml
+      - test/test_jsc/*.py
+      - yt_dlp/extractor/youtube/jsc/**.js
+      - yt_dlp/extractor/youtube/jsc/**.py
+      - yt_dlp/extractor/youtube/pot/**.py
+      - yt_dlp/utils/_jsruntime.py
+  pull_request:
+    paths:
+      - .github/workflows/challenge-tests.yml
+      - test/test_jsc/*.py
+      - yt_dlp/extractor/youtube/jsc/**.js
+      - yt_dlp/extractor/youtube/jsc/**.py
+      - yt_dlp/extractor/youtube/pot/**.py
+      - yt_dlp/utils/_jsruntime.py
+permissions:
+  contents: read
+
+concurrency:
+  group: challenge-tests-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+jobs:
+  tests:
+    name: Challenge Tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14', pypy-3.11]
+    env:
+      QJS_VERSION: '2025-04-26'  # Earliest version with rope strings
+    steps:
+    - uses: actions/checkout@v5
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v6
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install Deno
+      uses: denoland/setup-deno@v2
+      with:
+        deno-version: '2.0.0'  # minimum supported version
+    - name: Install Bun
+      uses: oven-sh/setup-bun@v2
+      with:
+        # minimum supported version is 1.0.31 but earliest available Windows version is 1.1.0
+        bun-version: ${{ (matrix.os == 'windows-latest' && '1.1.0') || '1.0.31' }}
+    - name: Install Node
+      uses: actions/setup-node@v6
+      with:
+        node-version: '20.0'  # minimum supported version
+    - name: Install QuickJS (Linux)
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+          wget "https://bellard.org/quickjs/binary_releases/quickjs-linux-x86_64-${QJS_VERSION}.zip" -O quickjs.zip
+          unzip quickjs.zip qjs
+          sudo install qjs /usr/local/bin/qjs
+    - name: Install QuickJS (Windows)
+      if: matrix.os == 'windows-latest'
+      shell: pwsh
+      run: |
+          Invoke-WebRequest "https://bellard.org/quickjs/binary_releases/quickjs-win-x86_64-${Env:QJS_VERSION}.zip" -OutFile quickjs.zip
+          unzip quickjs.zip
+    - name: Install test requirements
+      run: |
+        python ./devscripts/install_deps.py --print --only-optional-groups --include-group test > requirements.txt
+        python ./devscripts/install_deps.py --print -c certifi -c requests -c urllib3 -c yt-dlp-ejs >> requirements.txt
+        python -m pip install -U -r requirements.txt
+    - name: Run tests
+      timeout-minutes: 15
+      run: |
+        python -m yt_dlp -v --js-runtimes node --js-runtimes bun --js-runtimes quickjs || true
+        python ./devscripts/run_tests.py test/test_jsc -k download

.github/workflows/core.yml

@@ -7,6 +7,7 @@ on:
       - test/**
       - yt_dlp/**.py
       - '!yt_dlp/extractor/**.py'
+      - yt_dlp/extractor/youtube/**.py
       - yt_dlp/extractor/__init__.py
       - yt_dlp/extractor/common.py
       - yt_dlp/extractor/extractors.py
@@ -17,6 +18,7 @@ on:
       - test/**
       - yt_dlp/**.py
       - '!yt_dlp/extractor/**.py'
+      - yt_dlp/extractor/youtube/**.py
       - yt_dlp/extractor/__init__.py
       - yt_dlp/extractor/common.py
       - yt_dlp/extractor/extractors.py

.github/workflows/release.yml

@@ -269,9 +269,10 @@ jobs:
               "[![Master](https://img.shields.io/badge/Master%20builds-lightblue.svg?style=for-the-badge)]" \
                 "(https://github.com/${MASTER_REPO}/releases/latest \"Master builds\")" >> ./RELEASE_NOTES
           fi
-          printf '\n\n%s\n\n%s%s\n\n---\n' \
+          printf '\n\n%s\n\n%s%s%s\n\n---\n' \
             "#### A description of the various files is in the [README](https://github.com/${REPOSITORY}#release-files)" \
-            "The PyInstaller-bundled executables are subject to the licenses described in " \
+            "The zipimport Unix executable contains code licensed under ISC and MIT. " \
+            "The PyInstaller-bundled executables are subject to these and other licenses, all of which are compiled in " \
             "[THIRD_PARTY_LICENSES.txt](https://github.com/${BASE_REPO}/blob/${HEAD_SHA}/THIRD_PARTY_LICENSES.txt)" >> ./RELEASE_NOTES
           python ./devscripts/make_changelog.py -vv --collapsible >> ./RELEASE_NOTES
           printf '%s\n\n' '**This is a pre-release build**' >> ./PRERELEASE_NOTES

.github/workflows/signature-tests.yml

@@ -1,41 +0,0 @@
-name: Signature Tests
-on:
-  push:
-    paths:
-      - .github/workflows/signature-tests.yml
-      - test/test_youtube_signature.py
-      - yt_dlp/jsinterp.py
-  pull_request:
-    paths:
-      - .github/workflows/signature-tests.yml
-      - test/test_youtube_signature.py
-      - yt_dlp/jsinterp.py
-permissions:
-  contents: read
-
-concurrency:
-  group: signature-tests-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
-
-jobs:
-  tests:
-    name: Signature Tests
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, windows-latest]
-        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14', pypy-3.11]
-    steps:
-    - uses: actions/checkout@v5
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v6
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install test requirements
-      run: python ./devscripts/install_deps.py --only-optional-groups --include-group test
-    - name: Run tests
-      timeout-minutes: 15
-      run: |
-        python3 -m yt_dlp -v || true  # Print debug head
-        python3 ./devscripts/run_tests.py test/test_youtube_signature.py