The footage to gather

  1. The user's starting screen
  2. The required action
  3. Confirmation that it worked

Give each moment a little breathing room. Get close enough to show the detail, and keep the original clips handy.

Plan a first-session lesson

Opening

Explain what the user needs ready before beginning.

Middle

Group setup into a few checkpoints and pause on any choice that affects the result.

Ending

Point to the first useful action after setup.

Review it for customer support teams

Match the version of the interface customers currently see.

Ask yourself: Can the user tell what is required and what can wait?

Watch it as if you were seeing it for the first time. If something is unclear, try a different cut or add the missing shot.