please tell us why you had to hide away for so long lyrics

It's unclear why the music video should have the wrong lyric shown, but it is very likely that whoever put it together understandably misheard the lyric and put the wrong text. The incorrect lyric fits quite well with the vocodor sound. Blue Sky features text across the screen during this section that says 'Mister Blue Sky' (with an additional syllable added to 'Sky').

Blue sky please tell us why you had to hide. You had to hide away for so long (So long) Where did we go wrong Hey there, Mister Blue Were so pleased to be. Blue Sky' and the ending sounds remarkably similar (with an extra syllable added). Blue sky please tell us why you had to hide away for so long. This may be in part because several vocoder lines earlier in the song say 'Mr. Despite several instances of official confirmation of what the voice says, doubt continues to persist amongst fans.

Blue Sky features a vocoder voice saying 'please turn me over.' As it's the last song on the third side of the Out Of The Blue album, it's instructing the listener to turn the record over for side four (which, of course, doesn't apply to modern CD or digital download technology).

Please tell us why you had to hide away for so long lyrics