Create a cinematic dark mystery YouTube intro for a Bangla channel named “রহস্যঘর”.‎‎Style should be horror, suspense, mysterious and professional.‎‎Start with a black screen and eerie ambient sound. Slowly show dark smoke moving across the screen. A rusty old door appears in the middle under moonlight. The door slowly opens with creepy sound effects. Inside the darkness, glowing red eyes briefly appear. Add cinematic glitch transitions, shadow movements, crows flying, and fog effects.‎‎Text animation in Bengali:‎“পৃথিবীর সব রহস্যের উত্তর আজও মেলেনি…”‎“কিছু সত্য লুকিয়ে আছে অন্ধকারে…”‎“আর সেই অজানা রহস্যের দরজা খুলতেই…”‎‎Final dramatic reveal:‎“রহস্যঘর”‎‎Use bold cinematic Bengali typography in white and red colors.‎‎Background music should be dark cinematic horror with deep bass, heartbeat sounds, whispers, and suspense build-up.‎‎Color tone: black, dark red, grey, moonlight blue.‎‎Ultra realistic, high quality, cinematic lighting, 4K, professional YouTube intro style.