How I recorded my first product demo in 54 seconds (OBS, ffmpeg, openai.fm)

I shipped my first product demo video this week for Convertify (my free image converter). 54 seconds, no team, no budget. Here is the exact toolchain and what I would change next time. The stack OBS Studio for screen recording at 1920x1080, 60fps, CRF 20. The 60fps is not vanity. Product demos live and die on smooth scroll and cursor motion. 30fps...