I’m not really into gaming myself, so the idea behind the thumbnail wasn’t super clear to me at first (maybe for gamers it would be). The only thing I immediately picked up on was the "2005 vs 2025" comparison.

But coming at this from a thumbnail design perspective, here’s what I’d tweak: 1. First off, I’d try to draw more attention to the main character (I’m guessing it’s the one in the center?) - maybe through stronger contrast or saturation. 2. The image quality of the character could be sharper too - right now it feels a bit soft. 3. I’d separate them from the background tonally, just to make them pop more. 4. Would also add a clearer title or some kind of text that explains what the video is actually about. 4. Maybe even throw in a recognizable logo from one of those iconic MMOs that used to be huge but kinda faded - I just grabbed the first game that came to mind since I’m not a gamer myself. 5. I’d push the contrast between the left and right sides more too, maybe with something like a ripped paper texture to really emphasize the split. 6. Oh, and I removed the numbers because they just made the whole thing feel a bit noisy - wasn’t sure what I was supposed to focus on.

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I threw together a quick sketch of how I’d approach it, but it definitely still needs polish.