that David Frost footage is indeed extant - at least YCAGWYW is! and it's quite funny :E
i dowloaded it from youtube, but i don't know if it's still there. nzentgraf.de tells us:
16th June 1969: 'The David Frost Show', Wembley.
- You Can't Always Get What You Want (MJ/KR) -live vocals on prepared backing track
- Honky Tonk Women (MJ/KR) -live vocals on prepared backing track
- interview with MJ by David Frost
Note: YCAGWYW was aired on July 7, HTW was aired on August 21
but that's
not the occasion of the Chris Walter photo that steffiestones doesn't believe me about