A single generated frame can be perfect while the clip it belongs to is unusable, because the model has no persistent memory of the object between frames. Textures crawl, patterns swim, and a logo reassembles itself slightly differently four times a second.
The mitigations are all forms of constraint: generate from an approved still rather than text, supply first and last frames, keep shots short, and avoid fine repeating detail in anything that has to move. High-frequency pattern is where coherence fails first.
QUESTIONS PEOPLE ASK
Why does my AI video flicker or morph?
The model is regenerating detail per frame without a persistent reference. Shorten the clip, drive it from an approved still, and remove fine repeating patterns from the subject.