Ok, so I hope I don't get into trouble with the forum for giving myself an answer and a matching thumbs up, but I have found an answer.
It is a hardware issue. If you look at a 3.5 mm audio jack, it has a brass (? I don't know my metals) stem with little rings that seperate the stem into segments. If I remember correctly: 1 ring/2 segments is a mono channel for sound, 2 rings/3 segments is a stereo effect (I may have them backwards, more segments enables each earbud to emit a different sound) and 3 rings/4 segments makes the fourth segment an INPUT instead of an OUTPUT for apple devices. I am not sure if only Apple products (mobile iOS devices specifically) need the fourth segment to read in. Like your microphone earbuds? Compare them to run of the mill dollar store ones and it will have that extra.
So yes, better sound input when using an iOS device as your video recorder is possible, but you have to have the right gear.