Automating my son's YouTube with Python and FFmpeg

My son Ben is 12. Back in August he decided he wanted to start a YouTube channel. We talked about what it could be and he landed on Premier League score predictions. Every gameweek he'd predict the scores for all 10 matches, record himself talking through his picks, then after the weekend we'd see how he did and record a review. Simple concept. He was into it. I was into it. Let's go. The manual…