Personally I always found YouTube's player page layout utterly anti-functional. Having to scroll the whole page down for checking related videos or reading comments is frustrating, specially in a small screen.

With this layout, access to all related videos and all actions (including leaving a comment) is available right from the start, even on a 14 inch notebook. And you only need to scroll a bit down to see the full description or read the comments.

IMO, this is how YT should have always been. Or at least it's much closer.


Features:

• Fixed, scrollable side list (no more loosing sight of your video while checking related ones)
• Show full description by default (no more need to click any buttons, it's all there right away)
• Fixed, scrollable comments besides description (no need to scroll the whole page down) with top fixed comment input
• Optimize space use: action buttons below view count + smaller side list thumbnails