On the evening before the tribute concert, the german Pay TV channel Premiere did a kind of announcement.
This is the 30 min report, introduced by Lou Richter (german folks should know him as soccer expert today).
If I am not wrong, this is some new footage all around the tribute concert, incl some rehearsal parts, not on the video. ( I didn´t see all the tributes....)
Quality is very good+.
file sice is 300 MB. link link link link
Only use WinZip 8.1 or higher, no WinRar.