"Iron Hour" 是一张健身视频结尾用的片尾画面，采用粗犷的运动风格。厚重的金属质感名字和一行粗体黄色「Keep going」位于顶部的黄色速度斜纹之间，下面黑色地面上横排两个金框空视频位和一个圆形订阅位。换上你的频道名，再叠上 YouTube 元素即可。

Create a finished 16:9 YouTube end-screen background for the channel. Render exactly these two text strings, with exact spelling and casing, and no other text: “Iron Hour” and “Keep going”. Make “Iron Hour” the dominant channel wordmark, large and immediately legible at phone-thumbnail size; set “Keep going” beneath it as the secondary call to action in heavy yellow-and-black lettering. Use custom wide, block-built industrial sans lettering with very thick strokes, tight spacing, squared cuts, and clear open counters. Give the yellow letters a crisp black keyline and restrained dimensional edge, keeping every letter sharply readable. Use a near-black charcoal field with a subtle dark steel grain. Add directional yellow motion streaks and short angular speed marks around the copy and along the far edges, leaving the clickable regions calm and uncluttered. Arrange the wordmark in the upper safe area, with the supporting line below it. Across the lower half, provide two equal, completely empty video rectangles side by side, each with a clean, thin charcoal-and-yellow frame. At the far right of this row, provide one separate empty circular subscribe area, outlined in yellow with a dark interior. Keep all three zones visibly distinct, unobstructed, and free of thumbnails, previews, faces, play icons, interface graphics, or text. Keep lettering and important details within a generous safe margin. High-contrast graphic rendering, precise clean edges, controlled directional highlights, restrained background texture, no busy detail behind type.