just watched vid 1, I'll go through a few things:
start of match: drop a grenade or a c4, never just run off and approach
0:13 - nair only autocancels if you double jump it, never try to drop through a platform and nair, bair would have worked here
0:22 - throw a grenade into aether, he goes boom
and overall, more nades and less approaching
0:25 - never use fair, ever, especially landing with it, should have reversed a nade to land on a platform and not into an upsmash
0:30 - missed a free grab
First kill, good dair =]
0:47 - lrn2nadestrip
0:56 - don't cypher near the ledge, ever, its asking for a cypher grab ****
1:07 - wtf was that? missed ledgehog? don't try to ledgehog aether unless you're certain you won't **** up, just throw a grenade at him
1:11 - save your up tilts man, its an amazing kill move
1:17 - don't camp with nikita, THROW SOME NADES
dropping nades is great, lrn2through them though
lrn2camp
1:29 - you can't beat Ike's uair, jump away or reverse a c4 or nade so you can land
1:42 - where's the dthrow? pummels are nice, but one was enough there, and a dtilt follow up? I forgot Snake had a dtilt, you coulda ftilted or jab ->ftilt and had a much better result
1:48 - why are you landing on him? KEEP YOUR DISTANCE!! You ate an Fsmash from Ike because you landed on him
rolls are not an effective way to move around and will get you smashed as a result
2:16 - camp attempt, but with the side B again, just cook some nades and toss them, they're much better
2:27 - full jab can be powershielded, as you saw, bait a spotdodge and ftilt
2:34 - you don't have to full charge your mine, it works just fine uncharged and you keep getting punished for trying to full charge it
2:45 - dthrow-> read his roll or getup attack-> utilt, you could have had a kill
Here's a few pieces of advice
-recover high, you don't
-Put c4 on platforms, it has a crazy downwards hitbox
-don't down tilt, nikita, or forward air
-CAMP CAMP CAMP
-shield more, roll less
-bair out of hitstun, not dair
/longest post I ever wrote