In the spirit of constructive feedback, spend the time and effort to record your product demonstrations in a more professional environment. Or generate a fake background at a minimum.
"What works well for HN [demo video] is short and direct, with zero production values. Skip any introductions and jump straight into showing your product doing what it does best. It should take only a few seconds before we see it in action, doing something cool. Voiceover is good, but no marketing slickness—no fancy logos or background music or anything like that!"
I can see how maybe this could be counter-grain for some enterprise products.