Okay, I'm watching the match on Final Destination.
Uhhh... dash attack approach? Not really safe... it worked but... yeah. Just be careful with that. Jump cancel your grabs, too.
0:18, was that supposed to be a pivot grab? Woulda been good, if you got it off.
Ouch... sweetspot the edge. Nice chaingrab, though.
At high percents, you probably just want to go into an fthrow/dthrow and tech chase into an fsmash or the like, because you're really not going to get anything significant from a uthrow.
Ehhh... Dancing Blade? That's risky... it's not that hard to DI out of or avoid, and Fox will eat your face if you lag that much.
You're recovering really high... you'll eat bairs and die fairly easily that way.
Wow... you're really getting eaten by that shine. Best thing to do, really, is just not go near the edge. Every time you're dying it's because you've been really close to the edge and he's gotten you off in some gimpy way. If you stay towards the middle of the stage, it not only puts in you a better position to combo/edgeguard, but it also makes it a lot harder for him to get you off the stage and shinespike you.
You might consider approaching with fairs instead of nairs too. Nairs are not as efficient to space and generally end in you flying past your opponent. They're better for comboing too.