Pro V7.2.0: Twixtor

If still warping, your original footage might be too low FPS (e.g., 24fps) to slow down significantly.

Best results come from footage shot at 60fps or higher. Twixtor Pro v7.2.0

Search for "Twixtor Pro" in your effects panel and drag it onto your nested clip. If still warping, your original footage might be

To make this guide more tailored to your project, let me know: Are you using or Premiere Pro ? If still warping