YouTube "Watch Later" Playlist Sync Script

This PowerShell script automates the process of managing and syncing your "Watch Later" YouTube playlist by:

• Downloading videos from the playlist.
• Deleting locally stored videos if they are no longer in the playlist.
• Keeping track of downloaded videos to avoid re-downloading.

Features

1. Playlist Information Retrieval: Retrieves all video IDs in the "Watch Later" playlist.
2. Local File Management: Compares downloaded videos against the playlist and deletes files not present in the playlist.
3. New Video Downloading: Downloads new videos added to the playlist using yt-dlp.
4. Cookies Management: Uses cookies from the Vivaldi browser to handle YouTube authentication.

Prerequisites

1. PowerShell: Ensure you have PowerShell installed on your system.
2. yt-dlp: Install yt-dlp for video downloading. Download yt-dlp
3. Browser: Ensure your youtube.com cookies are accessible from the browser.
4. JSON Parsing: Ensure PowerShell has the ConvertFrom-Json cmdlet available.

Installation and Setup

1. Clone this repository.
2. Open PowerShell and navigate to the script’s directory.
3. Modify the following variables in the script as needed:
   • $playlistUrl: URL of the "Watch Later" playlist.
   • $cookiesBrowser: Browser to use for cookies (default: vivaldi).
   • $downloadFolder: Directory to store downloaded videos.

How to Use

1. Open PowerShell and navigate to the script’s directory.
2. Run the script by executing:

   .\script.ps1

3. The script will:
   • Fetch the playlist information.
   • Compare local files to the playlist.
   • Delete videos not in the playlist.
   • Download new videos from the playlist.

Configuration Variables

• $playlistUrl: The URL of your "Watch Later" playlist.
• $cookiesBrowser: The browser to extract cookies from (default: vivaldi).
• $downloadFolder: Path to the folder where videos will be saved.
• $archiveFile: File used to track downloaded videos.
• $videoFile: Naming convention for downloaded videos.

Notes

• Ensure you have the necessary permissions to delete files in the specified $downloadFolder.
• The script is configured to use yt-dlp and assumes it is installed and accessible in the system PATH.
• Use this script responsibly and ensure compliance with YouTube’s terms of service.

Troubleshooting

1. yt-dlp Command Not Found: Ensure yt-dlp is installed and added to your system PATH.
2. Permission Denied: Run PowerShell as an administrator if you encounter permission issues.
3. Cookies Not Found: Verify that cookies are accessible from the specified browser.

Enjoy syncing your YouTube "Watch Later" playlist effortlessly!