Confirmed, make the full 60 seconds.
1. Follow Disney animation principles: anticipation, ease in and ease out, arcs, follow-through and overlapping action; use them only on characters and transitions, and keep the teaching text stable and easy to read;
2. Add voiceover, light music and cue sounds, and keep the voice clear;
3. Export a 1080×1920, 30fps MP4, and check it yourself: duration, typos, audio-visual sync.