Alrighty. So, let's go ahead and break the video down.
The first ten seconds of the video encapsulate how that matchup should go for you; Snake has a lot of trouble dealing with pressure up close, kind of like how Link does, and struggles moreso once he's up in the air.
Your first death could've been completely avoided had you just did a flame choke into the ledge, but before that had happened, you were whiffing a lot of moves whilst facing the wrong direction. Don't get too committed to the attacks you're trying to throw out, or you're going to find yourself throwing punches at empty space on a sort of 'autopilot'.
I think that by 6:45 (in-game timer) that you should've killed Snake at least once. You tend to do a lot of F-airs, which are great killers, but G has some awesome spacing options in his B-air that double as potent finishers at fairly low percentages.
At 2:00, WIz throws a 'nade at you, and probably could've killed you with a U-air if he'd reacted better to it. On your part, don't be afraid to shield more, and to hold your shield for more than a nanosecond.
At ~2:23, you get Wiz off of the stage at about 50%, but just DD around rather far from the edge. Don't be afraid to put yourself closer to the ledge, and punish his recovery with some B-airs. Really, when you see Wiz recovering above the ledge and away from the stage, that's a perfect setup for a B-air punish. At exactly 2:25, Wiz is lined up perfectly for a nice backhand to the jaw. Punishing his recovery like that, over and over, can net you some pretty quick kills, and rack up damage quickly. I guess my point with this, is that you need to capitalize on the opportunities that you make for yourself more often. There are plenty of times up to this point where you could punish Wiz more for poor reactions, whiffed attacks, or bad recoveries, but did not.
This isn't specific to Ganon himself, but use that platform more. Use the stage more. Shorthop-waveland-Uair off of that plat more, or off of the ledge, in order to mix up your approaches and offenses. Get Wiz onto the platform at an early percent, and use the height advantage to try and boot him up to the ceiling more quickly than normal.
Of course, when you get Wiz on the ground, there's always the option of an immediate Wizard's Foot, which can be an extraordinary killer at low percents.
All-in-all, you have a solid game, a grasp of tech skill, but need to take advantage of the stage more often, use more discretion with your tech (don't just do it to do it), and punish. Once you've got Snake in a corner, making a poor recovery above the stage, you can take advantage of it and waste him. You played a good game, and the only reason I would say it was at all in Wiz's favor, despite you having higher tech skill and knowledge than him (just my own judgement on that), is that Ganondorf simply suffers once Snake gets a little distance, and can exert control on the stage.
