No worries. According to the video, DC came to Landis with an idea of rebooting or retconing DoS in pre52 continuity with Greg Pak but since he couldn't change his schedule around, it didn't come to fruition. I think this story still is possible for the New 52 -assuming they do a past story arc showing what actually happened- but Landis created this video to tell people what his idea is without the input or editing of Greg Pak. Landis says he wants his story out of continuity and with good reason. To sum the first half -The Doomsday half- it shows Doomsday nearly kill every single hero it comes across until he stabs Kal until his face is nearly shredded off -literally- until Superman decides "Okay, gotta kill him." He kills Doomsday but instead of dying he decides "F this, Superman is stupid. Krypton is STUUUPID." He goes back to Smallville, lives there, something cool happens I admit while he's there but I won't spoil it, then he's convinced to be Superman again when .. part 2 happens. But I won't spoil that either. Sorry, this seems really convoluted but I'm trying to work around spoiling a lot for you.
I can see why the story being OOC would have been better had Landis been involved in the project. Some of his ideas such as DD killing every hero he fights and Superman giving up being Superman are ideas that DC probably wouldn't get behind. From your description, some things do seem good like the return to Smallville and Doomsday being a rampaging beast once again seem interesting. But your eloquent description of the "Krypton is STUUUPID" bit makes me perplexed about what the deal is there. Guess I'll have to watch this for myself to get the full deal.
Landis is somewhat known for being a little fratty so "Krypton is STUUPID" was eloquent when it comes to his persona ahah. But I do think you should watch it because Krypton being stupid plays a huge part in the second half of the story, in which Superman may or may not be a murder so watch out, you might get angry over that, and also because there is still a chance this story becomes reality.
Ah right that does make sense. He's seemed that way in the videos I've seen of him. Regarding the murdering comment, I am fine with Superman 'killing Doomsday' since Doomsday is like an out of control, rabid beastial animal that doesn't listen to reason, has no concept of what it's doing wrong and is genetically programmed to be the ultimate force for destruction. He's a genetic abomination and kind of not alive given his lack of sense of self and other things. But Superman snapping Zod's neck or executing Pocket Universe criminals does get on my nerves since although their deeds are heinous, they are living beings that have made poor choices but that doesn't give anyone the right to take their lives into the hands the way they've done before. That isn't the kind of morality I approve of.