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 for a converter tool with drag-and-drop looks laggy even when the tool is fast. CRF 20 instead of the default 23 because text on white backgrounds compresses ugly at higher CRF: you get that faint mosaic around letter edges.

Free, open source, deterministic. No mobile screen recording because I needed the desktop browser context (this is a "your iPhone photos on Windows" story).