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 Downloader subscription sites, at $10–15/mo — roughly $144 a year, every year. Reelsnag does the job for a one-time $24 — running locally on your own machine.