People vastly undervalue good audio quality. It also often makes the difference (given equal visuals) between great amateur and pro in e.g. the YouTube scene. I didn't have data to back this up before, but I bought a good microphone specifically for this purpose. People will simply like the audio, and by extension what I am saying and also me as a person, better. Meanwhile, my ears will continue to bleed from the awf…
Tomska used to have a video mentioning this (though in the context of making YouTube videos), in which he demonstated that video from a iPhone camera in conjunction with a professional mic was much more watchable than video from a professional camera with an iPhone mic. Sadly the video seems to have been removed, the only reference I could find was the last paragraph of this Wired Article, https://www.wired.co.uk/art…
Audio, on the other hand, a couple hundred dollars on a good mic and preamp/recorder will be worth it 100%. It will make a noticeable difference on both good speakers/headphones and on the small speakers in phones.