He does not need to do that Charlie because his editing software he uses shows all the sound waves linking in with the film clips. It really is a clever bit of stuff.
It is second nature to him now.
It only took him a couple of hours to edit the whole day's filming and linking in the music from another web source!!!
I have to remind myself at times that he is only 19 yrs old!!, but he has come on in leaps and bounds with this filming lark!!!!