function Download-YTDLP {
    Param(
        [Parameter(Mandatory=$true)]
        [string]$videoUrl,

        [Parameter(Mandatory=$true)]
        [string]$OutputPath,

        [string]$RejectString,

        [switch]$WithCookies 
    )
    
    $ytDlpPath = "D:\yt-dlp\yt-dlp.exe"
    
    # Start building an array of arguments using strict comma separation (Recommended format)
    $arguments = @(
        $videoUrl,
        "--write-info-json",
        "--write-thumbnail",
        "--convert-thumbnails", "jpg",
        "--no-progress", 
        "-t", "sleep",
        "--rate-limit", "5M", 
        "-o", $OutputPath,
        '-f', "bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best",
        "-S", "vcodec:h264",
        "--reject-title", $RejectString,
        "--playlist-reverse" 
    )

    # --- Conditional Logic Applied Here ---
    if ($WithCookies) {
        Write-Verbose "--- Using browser cookies for download. ---" -Verbose
        $arguments += "--cookies-from-browser", "firefox" # Added comma here too
    } else {
        Write-Verbose "--- Downloading without specific cookie credentials. ---" -Verbose
    }

    # Execute yt-dlp using the call operator (&) and passing the arguments array (@)
    & $ytDlpPath $arguments
}

# Example Usage: 
# Download-Video -videoUrl "URL_HERE" -OutputPath "./output" -WithCookies