Ok then.
I haven't looked over the 4th vid yet, so Ill go over that one.
00:14 - I manage to DI out the 4th down b of the DB, but I don't punish it. Sloppy on my part. It was also sloppy on Steel2nd's part to even go for the 4th down b hit on another Marth. It's a fact that Marth easilt DIes out of it and can up b out of it on hit. We both screwed up here.
00:16 - He gets the hit off, but doesn't finish the DB. Small mistake, but still important.
00:42 - I went for a grab and I shouldn't have done that. I should have just used Dolphin Slash.
00:46 - Screwed up here. Steel2nd took a risk with ShieldBreaker. It really wasn't worth it IMO. I should have punished with something good, but instead I go for a grab and it misses. Poor choices on both our parts.
00:48 - Steel2nd had a free DB after the d-tilt, but he messed up. Even then he pressured me enough that I was afraid and shielding. He could have took advantage of that either, went for the grab, or pressured my shield with a tilt. Instead he opted to roll away which reset the fight back to neutral, giving up his advantage. On a side not I roll towards him after this which was also a poor choice. A better opponent would have taken advantage of that.
00:55 - Poor spacing on the ledge and I eat a get up attack from Steel2nd.
01:00 - Same thing happens again.
01:04 - He takes a risk in attacking me. I play it safe and shield then I net a free grab. This was a mistake on Steel2nd's part. But then when I get positioning advantage I screw it up by going for a risky F-smash and I end up missing it. For this I am punished.
01:13 - I just take a guess here and figure he will try to attack and I spotdodge. I go for a grab and follow-up with some grab hits before I d-throw. This is good since it gets my opponent on the ledge and gives me the advantage.
01:19 - I fail to punish that ledgehopped fair and Steel fails to punish my mistake. Although he really shouldn't have ledgehopped fair anyway. It was a very risky move.
01:22 - I have went for the u-smash here and Steel took a huge risk in going for the D-smash and it wouldn't even have payed off since I'm not killing range at this point. He would have been better off with a d-tilt.
01:25 - I just screw up royally here. I messed up my gimp, help him to recover and fail to grab the ledge. Epic failure.
01:33 - Steel got scared and I knew he would. I read him easily.
01:40 - I do a good job of keeping Steel off the stage and forcing him to get past my ledge game and then he gets out it, so kudos to him.
01:52 - Could have punished that D-smash but I was too slow.
From 1:55 to 02:34 - I get gimped here and from then on Steel does a solid job of controlling me and reading me. As a result a take 41% in damage before I regain control of the fight. Evenutally I decide to just aggro him thinking that since I'm fairly close I can overwhelm him quickly. It works and then he is forced to contend with my ledge game. I time my F-smash to hit him the moment his invincibility wears off. He gets tippered and dies.
02:40 - This time I'm on point with punishing his DB with my own after I shield his assault.
02:59 - I manage to turn the tide. I use the Dolphin Slash to knock Steel behind me. This is a complete role reversal. I go from being at a big disadvantage to a big advantage. I take advantage of my err uhh advantage. I get in some good damage vs him, enough to give me a solid lead.
03:17 - I messed up badly here and by all rights I should have lost the match here. I would have if Steel's edgeguarding was better. But I manage to get back to the ledge. At this point Steel should have just DIed back and forward b stalled so he wouldn't put himself in a bad position to eat an attack. But he does up b to the stage and get an f-smash for the win.
Marth dittos are hard to analyze since Marth can't play his normal game, but it's great for training certain aspects of your game. These aspects are
1)Gimping
2)Safe shield pressure
3)Avoiding gimps
4)Punishing
5)Move counters
6)Ground game
All this stuff is pretty self-explanatory except for move counters. That's just my way of referring to moves that naturally beat other moves. For example, D-tilt will lose to SH aerials. Why? Because d-tilt hits low and with a SH aerial you will jump over the d-tilt to attack. F-smash beats DB thanks to range the F-smash has. Things like this are very important to know in Marth dittos and in match-ups where characters have compareable range to Marth or even more range to Marth.
Overall we can see that it's just my experience and overall knowledge of Marth that gets me the win vs Steel2nd. I also play safer, take far less risks, and my edgeugarding is better.
In summary I'm the better player. But if you watch the vids from the first time we played to the very last vid you can see the evolution in his play style. You may also notice that his aggressive style begins to change into my much more passive style.
Now, this isn't to say that aggression is bad, I just prefer to be passive and use my abilities to control my opponents movement and actions. This makes it MUCH easier for me to read my opponent. Whenever I hit Steel seemingly out of the blue with an attack, that attack isn't random. More often then not I put Steel into a position where he had very few options so all I had to do was choose was an option to either cover all of the options he had at his disposal or just do something to cover his best option. Either way the situation is in my favor and odds are I will get in my hit if I play my cards right. Not to say my opponent can't get out of those situations, but it takes a clear head and quick decision making to deal with being at a disadvantageous situation.
Also this is out of the blue, but you have gotten alot better Steel2nd in such a short amount of time.
Props to you. ^_^
Anyway is there anything that anyone would like me to elaborate on?
. I did terribly that 1 match only 
. There's little I can say, but 2 things seem to stick out for me. 1, you're a little too camp happy, and 2. you seem to miss opportunities to punish mistakes. Thats it really.
