3 स्किल
A Screen Recording Somebody Can Follow
Record a window at high zoom on a cleared screen, then zoom, trim and label each step so a demo stays followable on a phone.
Audio That Survives a Phone Speaker
Level the voice first, split the music so it can drop under speech, and check the mix on a phone speaker before cutting a frame of picture.
Subtitles People Can Actually Read
Correct names and numbers first, then fix line length, placement and contrast, then decide between burned-in captions and a subtitle file.