- Thumbnail needs work - looks stretched and low quality
- Title needs work - like literally anything else will be better, trying making it more curious or something that'll make people want to click
- You mentioned the sound quality - yeah I honestly wouldn't publish the video with this audio. Keeps clipping, was hard to get through the first 10 seconds
- Work on your flow - lot's of um's and ah's.. which makes it sound authentic but too much and it loses some professionalism to it.
Good attempt, but I'd highly recommend you work on your audio before anything else. Audio is the most important thing in good video content.