For those who are interested in the cutscene from earlier, there are more information
here but in French.
He explains that this video is not a fake and that he used a program he made himself, named Makou Reactor, and that allows to edit the FFVII scripts during the "screen phases" (everything not during fights, menus and map). He also used the program "Loveless" to edit text, because in French too, we suffer horrid translations XD He used texts from the retranslation project "Néo-Midgar" and translations from the japanese of "The Face of the Moon".
The breakdown, scene by scene [translation from the link, and when I write 'I', it's just a direct translation of course, I haz nothing to do with it]:
# Bar "7th Heaven" - Basement:
1. At the beginning of the video: he put it there for context, because we all know this scene: first mission is finished, and Cloud and barret clash, then go upstairs to have his money.
2. At the end of the video: it's a scene that some know under the name of "materia" and which is accessible through the debug room, but until then, no one could show what was before. He didn't have to do anything to unblock this scene, it naturally follows the first one.
# Bar "7th Heaven" - Ground Floor:
1. With Barret: Normally in the game, Tifa will talk to you and will remind you the famous promise. Except that this is the summarized version of everything that you see in the video. There is another way that allow you to advance less in the game and see all the cut scenes that follow. To unblock the alternate scene where there is only Barret who comes to pay Cloud, I won't hide the fact that I had to fiddle a bit with the scripts, but what you see haas been written as it is, I just had to face some mixing with the original scene. Hence the bug when we take the money.
2. With Tifa: After listening Tifa in the slum, Cloud comes back in the bar where Tifa is watching TV and asks him if he finally wants to participate to the second mission. For this scene, the only thing I had to modify was... the TV! There was a tiny bug in the decor's animation, that prevented Tifa to switch on the TV!
# Slum:
1. With Tifa: All I did to not see the scene where Tifa storytells the Nibelheim's scene and promise in the bar allowed me to automatically unblock this scene. So, I didn't touch anything, except the texts...
2. With Johnny: When he gets out of the slum, Johnny comes to see Cloud; his speech has been badly translated, and I didn't manage to make it more comprehensible. In any case, he's not happy that Cloud leaves Tifa.
3. Johnny's house: All the dialogues normally don't appear in game, but they do here because of the variables that have the correct adjustment.
# Nibelheim:
1. Starry night: I did a modification: at the end of the scene, instead of going to the 7th Heaven screen, he forced it to return to the slum screen.
2. The truck: Maybe you already saw this scene, it's accessible through the debug room. Now you know when it was supposed to happen.
# WhiteBG:
This particular screen has been erased from the international version of FFVII. I had to go take it in the Japanese version, and I recorded through emulator (not to much of a choice when we fiddle with the scripts). Activate the annotations to see the dialogues in French!
That's about it, he ends his speech thanking the guys who worked with him