Overal i think you're an okay Mario. You'll do well with people who don't know the basics of the game, which is a good start don't get me wrong. But i don't feel you're around many excellent or even up-to-par players. So here's a couple of tips.
1) Don't always use final destination, while your fludd under the stage is really effective, some stages won't do that, and you should definately be able to adapt to other stages such as smashville, yoshi's island, corneria, etc.
2) Enter a tournament or two, depending on your financial status you might not be able to do much more than play a couple of friendlies, but it's a good experience.
3) I'm not going to bash on the fact you used CPU's, because honestly you aren't always going to have people around and be able to record when those people are around.
4) Get a dvd recorder, or something that'll make your video better quality, but once again that's all in your financial status, not everyone has money.
5) There's no such things as combos, it's all gameplay, so looking at your video, don't you feel that everything is the same gameplay? It's very dull to watch, seeing new things and keeping each combo seemingly different (for example keeping a fludd combo up front, and then an u-tilt combo, and then u-air, d-air combo, and THEN doing your nex fludd combo) will make your combo video feel alot more interesting.
6) It's your music choice, and if you want to do linkin park, that's fine, it's hit and miss, some like, some don't. But try to steer away from overly used songs.
That's all i have for you, if you have wifi i recommend playing on wifi and just recording a bunch of matches, when something good happens use it. Good luck on your next combo, i mildly enjoyed your first and feel there's more to come.