Design a visually striking Black Friday promotional graphic with a 16:9 aspect ratio that conveys urgency and excitement. The centerpiece of the graphic should feature 'BLACK FRIDAY' in a bold sans serif font, utilizing a textured style and rendered in bright white to stand out against a dark, grungy background. At the top, include the website URL in a smaller size, also in white, ensuring it is clear but does not distract from the main promotional message. Below the central text, highlight 'UP TO 70% OFF' in a bold, outlined style, using a vibrant orange color that captures attention and emphasizes the discount. At the bottom of the graphic, create a vibrant red banner that prominently displays 'FREE SHIPPING,' ensuring it is bold and eye-catching. The dark, grungy texture of the background should enhance the sense of urgency and excitement, making the promotional message more compelling. Additionally, add placeholder text for product descriptions in a smaller size beneath the main promotional elements, ensuring it is legible but does not overshadow the key messages. The overall design should be modern and dynamic, with a strong focus on bold typography and vibrant colors, effectively communicating the promotional offer to potential customers.