Once I had the raw video footage (single unedited file), it took me something like 5 hours to create the final video. Some of that time was recording/re-recording the voiceovers, writing some spreadsheet formulas to create ffmpeg command lines for splitting the video file, finding background music, and learning to use openshot (I'd never used it before).

I think something similar would take me 1-2 hours today, and half that time would be rewatching the video to decide what to adjust.