The month of January 1969 was put aside for a new Beatles project. The plan was to record an upcoming live show and to film the rehearsals leading up to this show. In the meantime, it seems that new songs had been written and the rehearsals eventually led up to songs for a new LP.
The venue for filming consisted of a hangar at Twickenham Film Studios in London, England. The start of the project was January 02 1969 and the filming was directed by Michael Lindsay-Hogg and the sound would be engineered by Glyn Johns although George Martin would be present certain times during the month to review the audio.
Visual footage from this first day can be seen in the (still unreleased) "Let It Be" movie where there is a scene of Mal Evans setting up the equipment. The song that were worked on include "Two Of Us", "Don't Let Me Down" and "I've Got a Feeling".