Brian May has announced on his soapbox that the old Hammersmith'75 video has been restored and will soon be released officially, but Seven Seas Of Rhye, See What A Fool I've Been and God Save The Queen are only available in audio format.

According to him, even stills from that portion of the concert would be nice to have, and there will be a prize for anyone who can provide material for the new release.

Source: http://www.brianmay.com/brian/brianssb/brianssbjul09a.html