I wish I had videos too, but I can't take any now, Madden was a very early sell back this year.
Some examples of All-Madden cheese I have experienced:
-The Super Bowl Collapse, which consisted of:
-My manually controlled defensive backs not responding to my button controls, leaving a triple covered CPU wide receiver to catch a TD pass uncontested. This happened twice in the sub-2:00 comeback, despite pressing the pass defend button on both occasions, and none of the surrounding defenders made a play on the ball, they just stood there looking at the receiver make the catch, despite being in position to easily break up the play if they made an attempt on it.
-AI defense psychically knowing my play call, and auto adjusting to any and all adjustments made. My play call was a run up the middle right. The defense came out clogging that hole. I flipped the play, and the defense clogged the hole I swapped the play to. Audible into a pass, and the defense audibles, spreading out to cover all of my routes. I audible back into a run, up the middle, and the defense adjusts clogging the middle hole that I was running into. After I finally just run a play, the defense forces a turnover that they take in for a defensive score. This leads to an onside kick recovery (they had tried an onside kick on the previous kickoff that I got, but then of course conveniently turned the ball over on the first play), which leads to the 2nd triple coverage TD pass as described above.
Outside of the Super Bowl Collapse:
-Obviously pre-determined outcomes. For instance, in a game against the Baltimore Ravens, the Ravens took a huge lead on me in the first half. Second half, I bench my QB (Alex Smith) and bring in the backup (Colin Kaepernick). I forget how much I was down, but I seriously think it was something like 35-0. I do know the actual details are in the Madden '12 "How's Your Franchise Going" thread, but obviously it's going to be buried deep in there. Long story short, I make the comeback, and in the 4th quarter, I am within striking distance of taking the lead and winning the game. Basically, my defense has held Baltimore to nothing but 3 and outs all 2nd half long. It is now Baltimore's ball, 3rd and long (if I recall correctly, it was 3rd and longer than 10), I made the 100% exactly correct defensive call. As Patrick Willis, I completely blow up the run, hitting Ray Rice straight up in the backfield in what should have been a loss. But of course, an animation triggers having Ray Rice break the tackle in ways that were physically impossible, and Ray Rice runs off for 20+ yards, and securing the win. The way this play played out was an obvious AI preserving of a pre-determined outcome.
-I was manually controlling my RDE, in this particular formation, it was Aldon Smith. Smith's assignment was to rush straight forward. I made no defensive adjustments on this play. When the ball was snapped, despite me pressing down on the joystick to cover Smith's assignment, Aldon Smith became uncontrollable by me and ran straight for the nearest sideline. It was almost as if he was running a contain (despite that
not being his assignment), but it wasn't a contain, as he continued running all the way to the sideline, and I couldn't regain control of him. Coincidentally enough, the CPU's playcall was a run right into the gap that Aldon Smith was assigned to fill up...
-I've watched this one happen more than a few times, where the CPU hits a short pass towards the sideline, and as the ball carrier now runs up field, my defenders run alongside the ball carrier not attempting to make a tackle. I'm not talking about chasing the ball carrier and not being able to catch up, I am talking about running directly side by side with the ball carrier without even attempting to make a tackle, where if they tried to, they would be able to easily tackle the ball carrier or knock him out of bounds. This is the best example I can give of this:
http://www.youtube.com/watch?v=fU8TeIxafXM
At least in that video, however, Heyward-Bey is trying to get an angle. This is not the case in my examples. They are just running alongside the ballcarrier.
-My defenders that don't respond to their assignments - I.E. a DB doesn't respond to a wide receiver's route, allowing him to become wide open.
-My above mentioned slot receiver mid air truck.
-Mediocre AI controlled defensive linemen tossing aside my highly rated offensive linemen as if they were kickers.
-QB's, regardless of accuracy ratings, missing wide open receivers by
yards, and throwing right into the waiting hands of defenders. For example, I made a downfield pass one time, my receiver was streaking down one sideline, and the pass went to the other sideline...
-On the same token, wide receivers, regardless of catch ratings, dropping wide open passes. It seems to happen to me more regularly on much needed 3rd down conversions, and it really comes off to me as the added "defense" for All-Madden AI, that I could call the perfectly correct play for the situation, and take advantage of the defense's weakness, but the game will make sure that my players fail, regardless of the circumstances.
I'm sure I could add more to the list, but it's been awhile since I played Madden '12. Like I said, it was an early sell back. That's just what's off the top of my head.
There was also the time where the QB threw a pass, while getting hit, and
after the pass was in the air, the wide receiver slipped in the rain, got up, and the pass still got to him in perfect stride as the defense stood around not making a play on the ball.