You will need:
- An internet browser
Step 1: Getting a video clip.
It is important to use a relatively short clip for this, you want to keep your file-sizes down. I cut down my original clip of 20 or so seconds down to 2 seconds. That's about 60ish frames of video.
An easy way to shorten videos in Quicktime is to use the Trim command. (Command + T, or Edit>Trim)
After the video has been trimmed, it is time to export it. (Shift + Command + S, or File>Export)
I use the 480p dedicated export settings, and make sure it saves as a .MOV file.