Why showcase hitting with a move that has ******** priority and invincibility frames? Usmash can break any move, seriously. At least show a combo started from it or something. =/
King of Grabs, U-Smash God, and Up-B Master all exceedingly pretentious. Getting rid of that at the beginning would improve the quality of the video exponentially. You could also cut out the clips that were really low video quality, since they detract from the "epic" feel, and were generally against opponents that made you look bad with how poorly they reacted to everything. Also, ditch the essay, and avoid stuff like the second song. I muted the video because the voice annoyed the hell outta me, and really detracted from the experience.
Some Peach pillaring would be nice, as well as the nair>jab reset, nair strings. Transitions are non-existent, but that can be a good thing. Get clips against characters aside from spaceys and Peach, since they're ridiculously easy to "combo". Try getting stuff against Sheik, since what you can do to her is fun to watch. Marth is another good choice, as is Falcon, Luigi (nair>nair>nair @0 percent is fun to watch for everyone, as is outprioritizing his moves with U-smash. If you don't have a good Luigi to play, though, ditch it), and Ganon. Also, adding in CC>anything against low tiers like Roy and GaW just for lulz (even going so far as to point out how funny it is) is a good idea. For additional flash, against FFers, you can dash attack into rapid FC u-airs (2 or so, then Nair or grab them, or, if you really want, and they DI terribly, parasol drag into dsmash after 1).
****. I just told you how to make my combo video. D:
5/10 overall.
EDIT: Dark Meow, come play me sometime. Bring your brother. I'll inspire you two to marry Peach.