The nice part about fan-shot footage from 1977 is that many of the cameras from that year were capable of recording sound as well as picture, as opposed to the cameras from the early 70's where they were only able to capture video but not audio! So a lot of the footage that is available from 1977 has the sound and picture together, instead of sound which has been "dubbed" onto the picture (and quite poorly most of the time!).
There are a couple of great videos available with fan-shot footage from 1977. One of them is entitled THE LAST TOURS and this one contains footage of Elvis from Kansas City 6/18/77 as well as Chicago 5/1 & 5/2/77. While not complete performances, this is some of the BEST 1977 footage you will find....with the accompanying sound!!! There is another video out there entitled THE KING ROCKS VOL. 6 that has lots of footage shot from various cities in 1977. While the quality of the footage varies on the video, there is quite a bit of good footage on this video, again with the accompanying sound!
These are 2 of the best 1977 videos that I know of! Does anyone know of any others???
Hope this helps you out!!