The farewell video is a clip from a prior work of theirs circa 2006, so I'm not sure how much can be translated from the clip to the real world circumstances behind the breakup. Of course, their selection of this clip to make the announcement in lieu of anything else could be construed as some sort of statement. Part of me wants to know everything, part of me prefers the mystery.

Good point. If, hopefully not, it was something like a sudden health issue, sampling that movie scene would be the single most awesomely daft punk way to announce it.