Make a specific folder for the project
Download video clips into your project folder
Look at your plan
Preview all you clips and select the best for each shot
Start your editing software
Import the best clips
Sequencing clips on a timeline
Trim / Scrub the clips
Audio: volume levels, sound effects, sound track, mute, balance,
Special effects
Titles and Credits
Export
Test Audience
Modify and improve then export again.