Opening Scene- Problems with filming and editing

When filming our opening scene we came across some problems such as the times we filmed meant it was hard to get the right lighting throughout, therefore i need to go back and change the opacity of some of the clips so the low-key lighting is continous throughout. Secondly, as you can see in our opening scene the sound cuts of at the end therefore i will have to go back and extend tghe sound so it doesnt look unfinished and unprofessional.