Bit embarrassing to see this kind of stuff on a United site. This is the kind of bitterness and revisionism we have been laughing at the scousers for for 25 years. Its taken 9 months for it to take a fairly big hold on many of our fans, in here.
As for the debatable pens, I think the Guzan one is the only really obvious referee error. There are a few where there is embellishment, but that's normal. As you can see by the ones the referee didn't give, it can be hard work getting a referee to acknowledge a foul in the box sometimes, they need, in my opinion too much, to see a player on the ground before they will blow.
Skrtel? Yes, he has been blatant holding from set pieces, as blatant as I have ever seen, but he is doing what is done every time on every set-piece into the box in every game. If they start blowing those, then we will have ten penalties per game.
What I really learned from watching that video is that if you get players into the box with the ball at their feet, quality players, then defenders and goalkeepers will do all kinds of daft things (Vidic, Jones I'm looking at you!). You don't get a lot of penalties from crosses.