YouTubers pay monthly for screen recording, captions, clipping and scheduling before the channel earns a cent. One-time tools fix the cost of production at the price of a single video's ad revenue.
The tool this job usually means renting is Opus Clip, at $29/mo (Pro) — roughly $348 a year, every year. Bloom Clipper does the job for a one-time $29 — running locally on your own machine.