The footage (8 mm) was shot by by Elizabeth Moore, the wife of Ken Moore who worked security for Elvis at the time. It's a recent acquisition from her collection.
This is a lot more than the bits we've seen posted before, and on the screens at the Aloha Exhibit in Graceland. The sound is from 1961.
Parts of this footage, in far superior quality, can be found on the DVD Aloha from Hawaii - 40th anniversary edition