I went thru the goals and rewound a few times, here my opinion:
1st goal: Honestly, it was everyone's fault on the ice. Raffl was out with G and Couts. The puck is in the slot and neither G or Couts can get the puck. The puck goes to the LW boards where Raffl pressures. Hagg also goes to the same guy to pressure him leaving the guy in the slot open that Giroux is standing behind.(48 sec) Hagg also coaststo turn around instead of stop start. Technically, G should not even be there but he is because he sees Hagg and Raffl are focused on 1 guy and the guy is open in the slot.(Couts covering Dman up high) So now G is trying to strip a guy from behind. AMac had his man standing behind the net but that guy also moves out to the wide slot at 48 sec. AMac choses to follow that guy leaving a clear path in front of MN instead of protecting the high danger area. At 50 seconds, G, AMac and Hagg all are waiving their sticks at the goal scorer with Hagg being the closest guy. Neuvirth goes down for no reason.
2nd goal: Laughton over pursues(1:08), but Peca is still below the goal line. in the corner. By 1:10, he has the angle on Laughton, Gudas is stuck on the net as Gourde is now on the far post. Manning leaves the slot area to follow his man who pretty much skates into the corner(1:11). Gudas is still stuck on the net and now Manning waives at Peca as he goes by and shoots. MN save, rebound goes to Gourde who originally was Gudas's guy.
3rd goal: Ghost...obvious.
4th goal: Weal loses puck in OZ zone, 3-2 the other way(2:16). Buy 2:19...it's a 4 on 4 in our end. Kuch spins away from Weal to get the pass, then again spins away from him to get into the slot. Simmonds chooses to leave Namest. to protect the slot, but the pass goes to Namest who scores. But also watch Flip at 2:21. He is outside the blueline and does not take one stride to get back, he coasts all the way "taking" his man behind him, but if he took 1-2 strides, he could have covered Namest quite easy who scored 2 seconds later....no awareness.
5th goal: 2:45 both Flip and Gudas are the closest 2 to the puck in the corner. Looks like Gudas strips Flip of the puck and an Atom level pass ensues where it's picked off. Guy throws it toward slot and it gets by Manning to Stamkos(2:47), who then passes to Namest who Gudas is trailing and is too slow to get back.
There you have it. That's how I broke it down after watching, replaying, seeing different angles, etc... And here is the link I used to watch to see the times of things happening:
So my opinion:
Goal 1: total breakdown on everyone on the ice. No one made the right play at all. G, Laughton, Hagg, AMac, Neuvirth all could have stopped the goal.
Goal 2: Gudas takes no one and stays caught up in the net for 4 seconds meanwhile he doesn't stop the passer who becomes his guy and his former guy is the eventual goalscorer. Laughton overpursues. AMAc drifts leaving the slot open
Goal 3: Ghost
Goal 4: Weal makes 3 mistakes
Goal 5: Gudas makes 2 mistakes, the weak pass and too slow to get to his man that scores. Manning misses 2 passes, the one to Stamkos and the one from Stamkos.