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C:\Users\pooti\Desktop\python_projects\Game Utilities\MC\YouTubeVideoToMusicDisc\DiscDownloader.py The current version of pytube (15.0.0) is broken due to YT chaning their JS code, breaking the regex parsing. Here are the steps to fix the library:

Answer gotten from issue on the pytube github: pytube/pytube#1954 (comment)

0. Make sure you've the newest version of pytube, pip install --upgrade pytube
1. Open cmd
2. Type pip show pip
3. Find the Location field your cmd prints out
4. Copy the Location path.
5. Press Win+R
6. Paste your copied location into the Win+R prompt
7. Find pytube within your installed packages (either by looking it up in the search bar, or just type it whilst in folder view to get the quick result
8. Open the pytube folder
9. Find cipher.py (by the same steps as 7)
10. Open cipher.py
11. Go to line 264-274
12. Replace that code with this:

    function_patterns = [
        # https://github.com/ytdl-org/youtube-dl/issues/29326#issuecomment-865985377
        # https://github.com/yt-dlp/yt-dlp/commit/48416bc4a8f1d5ff07d5977659cb8ece7640dcd8
        # var Bpa = [iha];
        # ...
        # a.C && (b = a.get("n")) && (b = Bpa[0](b), a.set("n", b),
        # Bpa.length || iha("")) }};
        # In the above case, `iha` is the relevant function name
        r'a\.[a-zA-Z]\s*&&\s*\([a-z]\s*=\s*a\.get\("n"\)\)\s*&&.*?\|\|\s*([a-z]+)',
        r'\([a-z]\s*=\s*([a-zA-Z0-9$]+)(\[\d+\])?\([a-z]\)',
        r'\([a-z]\s*=\s*([a-zA-Z0-9$]+)(\[\d+\])\([a-z]\)',
    ]