After revealing problems in 1st cut video, I immediately search for solutions in Adobe official website. There is two main problem need to improve, light contrast and volume.
Image 8: working process screenshot
Firstly, I changed the light contrast by editing luminosity curves which allows me to tone the colour of clips and unify them as one. Then I edit the volume in Audio Track Mixer session, I set the volume in around 12 to 6 dB.
Image 9: working process screenshot
In this case, people can listen carefully they way they speak and received information such as emotions. However, in order to keep their original voice and show how was the environment was like during interview therefore I did not reduce background noise.