User blog comment:Zero15/Code Geass R3/@comment-82.31.10.34-20130618134356/@comment-4684597-20130716000540

Dude that's so fake. There are so many different "Japanese Endings" all over YouTube. None of them are official. Besides, how could Lelouch be alive anyway? He didn't recieve Charles' Code, because it is impossible. A user can only attain the Code of an Immortal if that Immortal gave the user their Geass. That's what C.C. and Charles did. C.C. got her Code from the Nun due to the fact that she was finally strong enough to take it from her. As for Charles, he was strong enough as well, but didn't take the Code until the episode when Lelouch attacked the Geass Order. Meaning that the only way for Lelouch to gain Immortality, is by taking C.C.'s Code, which we do not know if she had or had not gained. To add on to this, each Immortal that has had a Code has died. The Nun died because it was her wish, V.V. died as well despite our not knowing of the terms of his contract with Charles. My guess is that once a person takes the Code of another person, their death is imminent, meaning that C.C. should be dead, but nothing's been confirmed. Well, this is all speculation and is just everything I've managed to understand from the Code Geass series and not rumors or theories made up by fans.

In the end, that ending is fake and Lelouch's "death" has not been confirmed by anyone. Unless someone has evidence of Ichiro Okouchi stating exactly what happened to Lelouch upon the Zero Requiem.