I was musing on this last night. I was watching a youtube streamer, who has about 1500 videos each about 30-120 minutes, and in his more recent videos (compared to the earliest) he has a nice desk microphone, a better camera, and his introduction style sounds more fluent and confident.My honest opinion on VIs [please feel free to dispute this] is that they don't measure the actual substance of your answers to the same extent as your ability to manage your time well, think on the spot, structure your answers and perform under pressure. I see VIs not as a time to show off general interview answers, but to show I can craft clean, coherent and balanced answers under time pressure in an uncomfortable environment. When I made that switch, I instantly started passing. [2 rejections, switched my focus, 3 passes]
I accidentally clicked on an older video, and while the main stream (the game being streamed) is identical in quality, the difference in video and sound quality of his voice/inlaid video of himself is very noticeable, and makes a big difference to the overall quality of the stream.
I was thinking therefore that it's likely that if you have a nice camera and microphone, then it's going to create an immediate better impression than if you are using just whatever your laptop comes with.