Take this with a grain of salt since I've never done Sonic versus Sonic. But I feel like eight minutes took too long, I didn't even finish watching the video. I feel like you need to be more fast/deliberate about your motions. There were multiple opportunities where you just sort of stood around and did nothing. Or walked over. Sonic's all about speed and creating opportunity.
With more rush and more aerial chasing, I think you could have ended the match a lot quicker.
Edit: Okay, I saw the entire video. The fact that you didn't win is already a major downer. I know if I asked the public to rate me, I'd make **** sure this was a win for me. Also, early in the video, your use of dair was questionable. You used it when you were in such close contexts, and not as an attack. It almost looked like you were doing it for transit, which doesn't make sense in close quarters because there's lag.
Sometimes, it looked like I was supposed to focus on dNes, which means he had the superior style of play and was outshining you, when you were supposed to be the star of the video. He was much more aggressive about his aerials and mixing up his moves.
The thing you lack, which I touched on earlier, is a sense of urgency. You need to keep being where your opponent is to get those early smashes. I think the Sonic v Sonic thing contributes to the length of the video slightly, but it should still have been a more faster paced video.
You, 5/10. dNes, like 7/10.