Recently I've been learning kdenlive to edit videos. I believe it uses ffmpeg on the backend. It's been great! The open source tooling around video recording and editing actually seems fairly good.
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.
If you want to screen record, I would highly recommend Camtasia. It does not cost that much and it excels at screen recording.
You can also use it for video editing. It takes 1-2 hours to learn.
If you want to shoot something outside the screen, most of the mobile phones work fine. You can get a tripod mount. Make sure to use a lapel mic to improve the sound.
- OBS Studio to record video
- Google Sheets to keep track of different segments of the video
- ffmpeg to split the original video into separate chunks (one per 'scene')
- openshot to arrange the scenes into the full video (speeding up some scenes and maybe slowing down others)
- (don't remember) for recording voiceovers
- sox for normalizing volume of voiceovers
- openshot for adding the voiceovers in the right spots (with the help of my Google Sheet) and background music