A:AnswerNo you don't absolutely need one but it is a bit easier than using bluetooth headphones and a wired mic. The 3.5mm is not the proper one, so there will be some tinkering if you choose to keep it.
A:AnswerYou should be able to as long as the GoPRo 7 has a 3.5 mm mic input. I would test it first just to make sure the GoPro is receiving the signal from the microphone first. Good luck on YouTube and have fun doing so.
A:AnswerDo you have a fairly new Apple laptop? If so, you need to buy a specific cable that splits into headphone and microphone and you need to plug the microphone and headphone in a specific order (or plug them both in before then plugging the cable into the computer). A regular audio splitter will NOT work.
A:AnswerThat would make a highly unsatisfactory recording! It would mostly pick up the noise of your shirt rubbing, man. My advise is to leave the espionage to the narcs, Que/no? Hahahaha!
A:AnswerYes for android smartphones with a 3.5mm TRS (Female) Microphone to TRRS (Male) Adapter cable. Might as well get the dual female end for both headphone and microphone (one is pink and one is green) since they cost about the same. This is a pretty good microphone too.