For me, there's a distinction between changing and expanding the ending. Changing the ending would just be throwing out everything that happened in the last ten minutes or so and putting in something new. That, to me, would be a bad move because it's doubtful Bioware will be able to quell the rage with it and it would piss people off who liked parts of the ending. I personally liked some of the ideas behind it, and believe the concepts were there. Bioware just completely screwed them over and put out a half-arsed PoS. But I would still be annoyed if the ending was changed because I did like some parts of it and think it could have been made into something much better given more focus. Instead we got a 5-minute cutscene at best and something that was completely pointless after the credits to serve as obvious DLC-bait.
Now, expanding the ending is another story. Going into more detail on what actually happened, addressing some issues like the massive plot holes, the supposed lore inconsistancies (I say supposed because some, like the relays, can be fairly easily explained), and what the hell happened to anyone would be compromising, not giving in. And that's an important distinction to make. Now, that'll mean some people, such as myself, will end up disapointed. There are people who have their own interpretation of what happened and will be sad to see it proved wrong. I know mine will be because the way I saw it wouldn't work for DLC at all for the Synergy ending. But it can be a forgiven disappointment if we're given something good instead.
I do agree with the arguement that simply saying 'games are aren't and therefore can't be changed' is stupid. But at the same time I think that it should be changed by the people who made it for the betterment of the artwork, not because people don't like it. It's entirely possible that Bioware is actually happy to be able to work on the ending to make it better. But I also think that some people have acted incredibly childish during the whole ordeal and made the entire movement less respectable. I suppose you get those types in everything though.
There is one major point of the video I disagree with though. And that is that Bioware obviously had no faith in their own ending if they were willing to change it 'so easily.' It's easy to look at them just suddenly saying that they'll do it from the outside and think they put up no sort of fight. But I doubt that was the case. It's just that the fight was more likely internal. Bioware likely knew that taking the fight to it's fans would not only be horrible PR, but also be an attack against fans that care about their games. That would only make things so much worse for them.
So instead they likely internalized the decision. And with the MASSIVE fan backlash they got, it's not hard to see why they chose to do it. Jim talked about listening to people and improving his show. That's not a bad thing to do. But Bioware was being attacked very harshly by a lot of people. And that's not also including the preassure put on by things like the charity drive which, while better, likely did put some good ol' guilt in them. This would be the equivalant of about a quarter to half of Jim's viewers standing up and saying 'YOUR SHOW IS SHIT BECAUSE OF THE ENDING' over and over again. Viewers who before that were saying it was wonderful and amazing. I can honestly see how such a backlash could be crushing to those who made the game.
There is always the chance this was all part of their plan though. And if so... well, Bioware is dead to me. But there's no way to know either way and simply assuming that it was is both unfair and rude to the company. Did they perhaps put out an ending they weren't happy with to get the game out? It's possible and perhaps even likely. Did they sit behind a desk and say "Let's make a shit ending then pump out DLC for it?" It's possible, but there's no real proof to say it's the case.