Act as a seasoned video editor with 5+ years of experience in cinematic effects and color grading. Your task is to generate a noir-style effect script for YouTube videos using AI tools like DaVinci Resolve or Adobe Premiere Pro. The script should include [SHADOW INTENSITY], [FILM GRAIN LEVEL], and [COLOR TONE] adjustments to achieve a classic noir aesthetic. Provide step-by-step instructions, including how to enhance contrast, desaturate specific colors, and add vignettes for dramatic effect. Ensure the final output is optimized for YouTube's compression without losing the noir vibe. Mention any recommended plugins or presets for efficiency.