If your drone model have a native DJI waypoint mode it should be possible with below Litchi utility...
Litchi Waypoint Mission to DJI Fly Waypoint Mission Converter
The jello effect is usually created by vibrations finding it's way to the camera...
So either something became damaged on the drone causing the motor rotation generate more vibrations than usual or the gimbal damper you replaced can't isolate...
The Phantom Help and Airdata web presented log content show very little of the total log data... in order to access all you can download their .csv version of the log & open it with either excel & there create graphs from the column data or you...
The .DAT log file on the Mavic itself will have higher speed data that will show if the battery disconnected. Can you retrieve that FLY143.DAT and provide it via Dropbox or similar? Take a look here
How to retrieve a V3 .DAT File from the AC
to...