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.
Step 2: Importing Video to Photoshop
When in the dialogue box, I selected the checkbox to limit the video to every 2 frames, so that I wouldn't have too many frames beefing up my file-size.
After the video was imported, I had 37 frames, or 37 layers to work with. That's pretty good.
Remember, I had started with two seconds of video, which at 29.97 frames per second should yield about 60 frames. In an effort to keep my file size small, I limited Photoshop to only import every other frame.