That thing is pretty glitchy and not suitable for fast-paced FPV frankly... hope you'll have better luck with that than I. ;-)
If I remember correctly, it won't work with ST16 even, only with the ST24 (or VLC etc). And its WiFi is even more glitchy than CGO3+'s. ;-)
I have one to transmit data from a custom camera/gimbal based on Sony's analog camera core with AlceOSD (both NTSC) driven by PX4, to ST24.
Modifying the ST16 to accept its video feed (for example using files from ST24) will be a pain. Some of the Flightmode is written in Java and it can be decompiled, but there are few binary blobs written in C/C++ too, and that's where things go south. ST16 = x86. ST24 = ARM.
Unfortunately I don't remember any more how the MK58 was used (I did play with its REST interface and shot photos and recorded videos something like five years ago), but some of these could work (please note the IP Helmut said: 192.168.110.1):
Projektvorstellung: CGO Camera Library für Android - Yuneec Typhoon Q500+)
http://192.168.42.1/cgi-bin/cgi?CMD=GET_STATUS
http://192.168.42.1/cgi-bin/cgi?CMD=GET_FW_VERSION
http://192.168.42.1/cgi-bin/cgi?CMD=GET_PHOTO_FORMAT
http://192.168.42.1/cgi-bin/cgi?CMD=GET_EXPOSURE_VALUE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_REC_TIME
http://192.168.42.1/cgi-bin/cgi?CMD=GET_SPACE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_SPACE_FREE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_CARD_FORMAT
http://192.168.42.1/cgi-bin/cgi?CMD=GET_AUDIO_SW
http://192.168.42.1/cgi-bin/cgi?CMD=GET_AE_ENABLE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_SH_TM_ISO
http://192.168.42.1/cgi-bin/cgi?CMD=GET_IQ_TYPE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_WHITEBALANCE_MODE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_VIDEO_MODE
http://192.168.42.1/cgi-bin/cgi?CMD=GET_CAM_MODE
See also:
bitbucket.org
PING,
INIT_CAMERA,
GET_STATUS,
GET_FIRMWARE_INFO,
RESET_DEFAULT,
SET_TIME,
SET_CAMERA_MODE,
GET_CAMERA_MODE,
START_RECORDING,
STOP_RECORDING,
SET_AUDIO_SW,
GET_AUDIO_SW,
SET_VIDEO_MODE,
GET_VIDEO_MODE,
GET_RECORD_TIME,
SNAPSHOT,
SET_EXPOSURE_VALUE,
GET_EXPOSURE_VALUE,
SET_WHITE_BALANCE_MODE,
GET_WHITE_BALANCE_MODE,
SET_IMAGE_QUALITY_TYPE,
GET_IMAGE_QUALITY_TYPE,
SET_PHOTO_FORMAT,
GET_PHOTO_FORMAT,
SET_SHUTTER_TIME,
GET_SHUTTER_TIME,
SET_ISO_SENSITIVITY,
GET_ISO_SENSITIVITY,
SET_SHARPNESS,
GET_SHARPNESS,
SET_AUTO_EXPOSURE_ENABLE,
GET_AUTO_EXPOSURE_ENABLE,
FORMAT_SDCARD,
GET_SDCARD_TOTAL_SPACE,
GET_SDCARD_FREE_SPACE,