It depends on what you are working on, if you want everything to be the best quality possible, you set the video quality to 100%, however even if you set it to 80, you would only able to see like 1-2% quality difference in between both of them.
To be true, you can use ChatGPT for many of your questions, it does give really accurate answers that might genuinely help. If you are just uploading to YouTube, his settings are totally fine, I see you are a musician who left photography, so you might prefer to go more on quality on the audio side rather than the video.
In total, his settings are general settings that you might choose if you are normally making content to upload on YouTube or Vimeo, maybe even just to store at home to see later. You should define your work, like more audio focused, video focused, focusing on both, etc… People here would then give you the best export settings according to your need.
Here is a post I recently did that is basically on the same topic of export settings:-