I can confirm the bug affects me as well using 0.9.15 (and the 0.9.13).

Renamed video after load:
  Jul 20 18:14 20190720-2013-0769.mp4

Original video on SD card:
  Jul 20 18:14 DCIM/100MEDIA/DJI_0769.MP4

Computer Time zone: Europe/Berlin (CEST, +0200)


Metadata original:

$ mediainfo DCIM/100MEDIA/DJI_0769.MP4
General
Complete name                            : /media/rsanta/6336-6530/DCIM/100MEDIA/DJI_0769.MP4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 376 MiB
Duration                                 : 31 s 599 ms
Overall bit rate                         : 99.9 Mb/s
Encoded date                             : UTC 2019-07-20 18:13:52
Tagged date                              : UTC 2019-07-20 18:13:52
Writing application                      : Lavf56.15.102

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : <email address hidden>
Format settings                          : CABAC / 1 Ref Frames
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 1 frame
Format settings, GOP                     : M=1, N=29
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 31 s 599 ms
Bit rate                                 : 99.9 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 (30000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.402
Stream size                              : 376 MiB (100%)
Encoded date                             : UTC 2019-07-20 18:13:52
Tagged date                              : UTC 2019-07-20 18:13:52


Metadata did not change after loading:

$ diff original-meta loaded-meta
2c2
< Complete name                            : DCIM/100MEDIA/DJI_0769.MP4
---
> Complete name                            : 20190720-2013-0769.mp4


Crosscheck EXIF info of previous still photo:
('mediainfo' does not show image timestamp, using 'exiv2')

$ exiv2 DCIM/100MEDIA/DJI_0768.JPG 
File name       : DCIM/100MEDIA/DJI_0768.JPG
File size       : 7348791 Bytes
MIME type       : image/jpeg
Image size      : 4000 x 3000
Camera make     : DJI
Camera model    : FC2204
Image timestamp : 2019:07:20 18:13:24
Image number    : 
Exposure time   : 1/1600 s
Aperture        : F2.8
Exposure bias   : 0 EV
Flash           : No flash
Flash bias      : 
Focal length    : 4.4 mm (35 mm equivalent: 24.0 mm)
Subject distance: 
ISO speed       : 100
Exposure mode   : Auto
Metering mode   : Center weighted average
Macro mode      : 
Image quality   : 
Exif Resolution : 4000 x 3000
White balance   : Manual
Thumbnail       : image/tiff, 27882 Bytes
Copyright       : 
Exif comment    : 


Conclusion:
* both timestamps are in UTC (video and image)
* at least mediainfo shows UTC timezone clear, whereas the image is without timezone
* in fact both are taken at almost same time
* logic seems to be that the timezone offset is added to the video, not image (because image is without timezone information)

I have no clue as to handle this properly.
One way would be to ignore the timezone information for videos - identical handling to images.
Other options would be to offer configuration for individual handling.