In Pro mode you will see 2 little icons on the right side of the display you ave to highlight the camera icon to take a picture then switch to video icon to shoot video. Read the instructions it shows how
The "instructions" user manual do not tell everything.
You have two modes, thats correct.
1) Video-Mode
2) Photo-Mode
In Photo-Mode, you can not start video-recording, only take photos in
maximum resolution @ 4000x3000 pixel jpg OR dng (raw) and only in this mode.
In Video-Mode, you can take photos and recording videos, but not at the same time.
If you like to take a photo in video-mode, you have first stop the recording and
you only can take photos in video-mode by the the video-resolutions:
Video-Modes:
4096x2160F25 1.90:1 (256:135) 4K
4096x2160F24 1.90:1 (256:135) 4K
3840x2160F30 1.78:1 (16:9) Ultra HD
3840x2160F25 1.78:1 (16:9) Ultra HD
3840x2160F24 1.78:1 (16:9) Ultra HD
3840x1440F30 2,67:1 (24:9)
3840x1440F24 2,67:1 (24:9)
1920x1080F120 1.78:1 (16:9) Full HD
*1920x1080F60 1.78:1 (16:9) Full HD
*1920x1080F50 1.78:1 (16:9) Full HD
*1920x1080F48 1.78:1 (16:9) Full HD
*1920x1080F30 1.78:1 (16:9) Full HD
*1920x1080F25 1.78:1 (16:9) Full HD
*1920x1080F24 1.78:1 (16:9) Full HD
* > no photo-function ... notification in top of the display, while trying to take a photo.
Photo-Mode:
4000x3000 1.33:1(4:3)
Further, the pictures are different in their color, changing the video-resolution.
If you like to take photos, you should change to photo-mode.