Sony FDRX3000/W Manual page 74

The highlight movie creation starts.
You cannot select MP4 and XAVC S contents at the same time.
You can select up to 100 movies by date or file.
If you disconnect Wi-Fi connection of the camera and your smartphone while creating the
highlight movie, the camera continues to create movie.
Press the REC/ENTER button of the camera to finish creating the highlight movie.
Hint
Use the "Settings" menu in advance to change the movie length, BGM
* This setting is only available in some countries and regions.
After creating the highlight movie, you can "Copy" it to your smartphone.
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and the audio mix.