Note: Painting (or using any other tool) on video frames is often called rotoscoping; although traditionally, rotoscoping involves the frame‑by‑frame tracing of live action images for use in animation.
Open the PSD you made for Exercise: GIF from video, click on the icon in the bottom left of the Timeline panel to switch to Video Timeline, then Save As with a new filename.
Change to the Motion workspace (Window > Workspace > Motion).
Select the topmost layer, then create a new video layer to isolate your animation (Layer > Video Layers > New Blank Video Layer). New layer should be above all the others.
In the Layers panel, select your new blank layer. In the Timeline, your new layer should align with the other video layers; if it doesn't, move it to the left so they're all aligned.
Zoom in on the Timeline to see individual frames: at the bottom of the Timeline panel move the slider from the "small mountain" icon toward the "big mountain" icon).
Move the current time indicator to the video frame where the animation will begin.
Start painting. You can use any of your painting tools to modify the layer. You can also use the Clone Stamp, Pattern Stamp, Healing Brush, or Spot Healing Brush to modify individual frames in a video file.
Click the submenu of the Timeline panel (upper right corner of the panel) and choose Enable Onion Skins. This will show you a preview of the previous stroke when painting.
Move to the next frame (Next Frame button is just to the right of the Play button).
Paint the next frame, then continue moving along the timeline, painting as you go. Change your mind? Any painting you do on a video frame applies non-destructive edits. This means you can discard the altered pixels on a frame at any time (Layer > Video Layers > Restore Frame or Restore All Frames).
When you've finished animating, save as animated GIF 128 No Dither, and submit to this assignment.
Can't change a rubric once you've started using it.